Katrina's and Nunu's ult are jokes. Way too easy to shutdown.

I'd go with amumu, morgana or gangplank.

Nunu combined with the new Cleanse.

altho Twisted Fate's ulti doesnt do any direct damage, but it is certainly one of the best ulti's in the game.

Solo or team play Twisted Fate's ulti just does it all. My vote on Twisted Fate's ulti. Solely for ultility purposes for game pwning

Amumu, i mean, if you dont have cleanse, might as well move your view to the fountain

I'd go with Gangplank. Sure Amumu's will destroy a team (if they stand next to him and get close together anyway), but Plank's can be used to push a tower, defend a tower, cover for escape, stop people from escaping, long range KS/ganking or as DPS in a team battle, and unlike Amumu, you dont need to be near him (and you can't cleanse cannonballs falling on your head, as oppose to cleansing bandgaes and running, in which case you've taken damage and need to fall back- at least till the ult is done).