Monk - good utility/survivability; medium damage
DK - best utility/survivability; medium damage
Druid - decent utility/survivability; higher damage in some situations
Paladin - not as much utility; highest damage
Warrior - Warrior
For the latter bosses, a DK tank is really, really nice to have. I'd say it's probably the most desirable of tank classes atm. Followed by Paladin/Monk -> Druid -> Warrior.
I don't see how this thread isn't redundant. I know the tier is waning but yeah... no one should be dying with ilvl upgrades. if you want to do dmg play pally>druid=monk
All tanks are pretty decent, warrior probably considered the weakest link but even then its not by much.
Pally has the most broke dmg, druid has great dmg for speedkills. Monk and DK are both decent dmg and survival. Druid survival is great pally survival i'm not sure if its considered great but its fine (may be great but i just dont know).
Monk and Pally have the best tier bonuses.
Even in a 13/13 mythic guild it doesn't matter what you play.