CC Tier List

UPDATE 3/24/2014: Added Loosen, Jonx, Eyeman, Yash, marked Kash and the fear bros for moving
UPDATE 10/19/2014: Moved Sion, Soraka, Kassadin and Talon due to rework/nerfs, added Braum, Gnar, Azir and Aatrox.
UPDATE 7/10/2015: Added Shrek'Sai, Tahm's spaghetti, Bard, Shrekko, moved Xerath to account for rework, demoted Azir as his knockup is being removed.
UPDATE 4/24/2016: Added Illaoi, Syndra, Jhin, Heimerdinger.
Moved Freelora from Tier 5 to 4, Taric to AOE stun category, Gragas from Tier 3 to Tier 1 (not a rework, I actually didn't know his kit), Shen and Urgot from Tier 3 to 2, removed a duplicate entry for Diana
UPDATE 4/25/2016: Noted Leblanc's silence removal, added Kindred and Aurelion Sol
UPDATE 12/21/2017: Accounted for all the reworks - GP and Vlad into new double AoE slow category, Warwick up to Tier 2, Galio and Maokai to Tier 1, Evelynn now only has a ST slow. Yorick from Tier 4 to 2
Added the furfags(Xayah+Rakan), Ivern, Kled, Ornn, Zoe, Kayn
UPDATE 12/23/2017: Moved Poppy from Tier 3 to 1, Karma from 4 to 3, grouped Ryze and Xayah in same category

Disables (Or CC, Crowd Control) are essential to keeping your enemies locked down and ensuring a battle goes your way.
Unfortunately this list may require a significant overhaul to account for uncleansable, irreducible disables like knockups and knockbacks, as they provide a clear advantage over ones that aren't.
This list's purpose is to aid in picking a team comp that can peel and initiate effectively, and can interrupt channeled abilities like Drain or Death Lotus. You will almost certainly get stomped on by Fiddle, Kat, Yi, even Nunu and other champs like that if your team has no hard cc, or that one guy with a stun isn't around. Normally I'd say don't be that guy, but if your teammates are derps, please, DO be that guy who can actually lock down and focus enemies. As a general rule, for every Tier 5 or Tier 4 champion on your team you should pick a Tier 2 or higher to "compensate" for it.
Revised rule of thumb: Your team should not have too many picks from Tier 5 or Tier 4, preferably none if you can play higher tier champions.

The tiers are in reverse order, going from worst at the top to best at the bottom. Categories within tiers are roughly weighted, but champions within categories are not.
Just remember this is based solely on how much disabling power a champion has at their best, and NOT on how much damage they can deal, how mobile they are, or effectiveness, although I do find that viability is generally proportional to the number of disabling moves.

I'm open to suggestions on where to move champions. In particular I am not sure on whether to split up tier 3 and how it should be done.

Stun is used here to mean anything that prevents you from casting, attacking, and controlled moving. This includes fear, taunt, charm, knockup/knockback, and suppression. Polymorph comes close.
ST = Single target

General Priority order for disable types:
Knockup/Knockback, Suppression > Stun, Fear, Taunt > Snare > Silence, Slow, Blind
AOE/Multi-target > Ranged > Melee

(5) Trouble tier: These champions have no disables whatsoever. Most of them have some sort of niche/gimmick like extreme damage or Mord's slave to make up for it. I strongly advise against picking them if your team is lacking in hard disables. Essentially if you pick one of these champions and fail to carry/do damage, you are completely useless. I speak from personal experience so feel free to mock me. I'll list what their gimmick is.

• Corki - (magic) damage
  
• Ezreal - damage
  
• Katarina - damage
  
• Lucian - damage
  
• Master Yi - can build ap or adextreme splitpushing, is also the original dunkmaster
  
• Mordekaiser - Children of the Grave, always shield never die huehuehuehue also DRAGON FORCE
  
• Nidalee - choice to build ap or ad with alternate form, including traps and the OP as hell javelin toss. She has lots of utility, it took me a while to realize none of her moves have crowd control.
  
• Sivir - spell shield
  

(4) Average Tier: Have a single disabling move. This should be bare minimum to carry your own weight with the team comp.

--Silence--

• Garen
  
  --Slow--
  
• Mundo - spammable
  
• Kayle
  
• Zilean - can be chained
  
• Nasus
  
• Talon - can hit more than one
  
• Illaoi
  
• Kindred
  
• Evelynn
  
  These guys have an AoE Slow field, some of them lasting several seconds.
  
• Akali - field, no damage but cloaks
  
• Graves - field, reduces vision
  
• Karthus - wall, shreds magic resistance
  
• Kha'Zix - most people take the spike rack evolution
  
• Kog'Maw
  
• Miss Fortune
  
• Olaf - Since it can hit multiple enemies, but its not likely.
  
• Trundle
  
• Tryndamere
  
• Twitch
  
• Zed - Same as Olaf
  

(3) Good Tier: 1 hard disable or 2 soft.  More like meh tier but I have quite the mix here.

--2 Slows-- 1 single target, 1 AoE

• Nunu
  
• Rumble
  
  --2 AoE Slows--
  
• Gangplank
  
• Vladimir
  
  --Blind and Slow--
  
• Teemo
  
• Quinn&Valor
  
  --Snare and Slow-- may be split based on which abilities are AoE
  
• Rengar - situational combo by timing ferocity meter
  
• Caitlyn - traps are situational but good for map control
  
• Lux
  
• Swain
  
• Varus
  
• Jinx
  
• Jhin
  
• Karma - as per the rework
  
  --Melee stun--
  
• Jayce - knockback
  
• Irelia - if her health is lower
  
• Renekton
  
• Udyr
  
  --Range stun-- It can be used from a range, Pantheon's is a gap closer but still
  
• Ahri
  
• Brand
  
• Elise
  
• Nocturne - Very low range, potentially moved due to fear rework(nerf)
  
• Pantheon
  
• Twisted Fate
  
  --Knockback--
  
• Vayne
  
  --ST Snare--
  
• Xayah
  
• Ryze
  
  --Unique--Nobody else has this combination of disables
  
• Shyvana - A giant push
  
• Diana - Vacuum Stomp
  
• Leblanc - 2Chainz (Slow into Snare)
  
• Kassadin - rework removed silence on his Q, but it can still interrupt channeled abilities
  
• Bard - ST slow that can be a 1 or 2 target stun if aimed right, AoE stasis. Extremely variable, a Bard with perfect aim on his ultimate would be Tier 2, but most of the time that doesn't happen. Stasis isn't quite as good as a plain stun or knockup as it does not allow you to damage them.
  
• Zoe - SLEEPY TROUBLE BUBBLE!!!
  
• Kayn - AOE slow, can be upgraded into knockup
  
• Fiora - some slows
  
  --AOE stun--Tentatively moved to Tier 2 depending on how good the AOE needs to be
  Annie and Kennen - They may have both a single target and an AOE stun, but they can effectively only use one of the two at any given time, it evens out to a short range AoE.
  
• Draven - pretty much
  
• Jax
  
• Riven
  
• Taric
  
• Tristana - It can hit multiple units if they are clumped
  
• Veigar - the delay screws it up a bunch
  
• Viktor - kind of weird but if used right works like this.
  
• Wukong - Uncleansable
  
• Rek'Sai - Uncleansable but in a rather small area
  

(2) Great Tier: 2 disabling moves, 1 or more of which is hard

--Unique--

• Darius - Technically when you get pulled you can still attack and possibly cast, but you're usually too surprised to do so, and his team mates can now pile onto you with their own moves.
  
• Morgana - Snare, AOE slow+stun
  
• Rammus - Long taunt and very small AoE knockback on powerball
  
• Yasuo - AoE knockup and ST knockup extension
  
• Cho'Gath - AOE stun+slow, AOE silence
  
• Soraka - AOE slow, AOE silence+snare
  
• Tahm Kench - yum yum eat em up. One stun and tongue lash can be either a stun or slow.
  
• Ivern - ST Snare, AOE slow
  
• Kled - ST pull, ST knockback
  
• Yorick - Circle wall, AOE slow
  
  --Silence and Stun--
  
• Malzahar
  
• Fiddlesticks
  
  --ST Stun and AoE Slow--
  
• Singed - it's singed, the most troll character in video game history. Now with a snare combo
  
• Volibear - melee range aoe slow
  
• Skarner - low cd slow, but its melee
  
• Ashe - An always on permaslow
  
• Xerath
  
• Urgot - If you hit more than 1 person while shield is up
  
  --AoE Stun and ST Slow--
  
• Shaco - Jack in the Box is very situational but can be devastating in skilled hands.
  
• Sona
  
• Malphite
  
  --AoE Stun, AoE Slow--
  
• Vel'Koz
  
• Ziggs
  
• Fizz
  
• Cassiopeia
  
• Orianna
  
• Lee Sin - like with Tristana, he can get multiple if he aims right and gets lucky
  
• Aatrox
  
• Kalista - If applied right
  
• Azir - Knockback in his ult.
  
• Syndra
  
• Heimerdinger - Upgraded Grenade or Turret
  
• Shen
  
  --2 stuns--
  
• Amumu - His ult doesn't really stun anymore but it can still shut down an entire team
  
• Alistar
  
• Hecarim
  
• Vi
  
• Aurelion Sol
  
• Warwick - point blank AOE fear
  
• Rakan
  

(1) Top Tier: 3 disabling moves, with at least one of them hard like a stun or knockup. If one of these guys gets ahold of you, you probably won't be doing much for a while. Picking one of these guys is always a good idea.

• Zac - Slow, knockback, knockup
  
• Lissandra - Slow, Snare, Stun
  
• Jarvan IV - Knockup, AOE slow, Wall
  
• Sejuani - Knockup, ST Stun, AOE Stun
  
• Anivia - AOE slow/stun, Wall, toggled AOE slow
  
• Thresh - Pull, Directional AOE stun and slow, AOE slow
  
• Leona - ST snare, ST stun, AOE stun/slow
  
• Blitzcrank - Pull, ST knockup, AoE silence
  
• Lulu - piercing slow, Polymorph, AOE knockup
  
• Xin Zhao - ST knockup, AOE slow, AOE knockback
  
• Janna - ST slow, AOE knockup, AOE knockback
  
• Nami - ST slow, 2 AOE knockups
  
• Zyra - AOE snare, AOE knockup, plants slow
  
• Braum - Slow, Stun, AOE knockup
  
• Sion - Slow and 2 knockups
  
• Ekko - Slow, 2 AOE slow fields, one of which can be turned into an AOE stun.
  
• Gragas - AOE Slow, ST Stun, AOE knockback.
  
• Galio - AOE taunt, 2 AOE knockups
  
• Maokai - ST root, AOE slow/knockback, AOE root
  
• Ornn - Lots of knockups and slows
  
• Poppy - Slow field, knockback, super AOE knockup ult
  

(0) God Tier: 4 disabling moves. The most lock-downy chumps in the game.

• Nautilus - Snare(on hit), Pull, AOE slow, AOE knockup. No longer the CC King
  
• Gnar - 2 AOE slows, AOE stun, Directional AOE stun+slow