Kevin61 said: Carnage! I TINYKITTY HATE CARNAGE! I refuse to roster him. He is the only 4* I don't have and will never have.
Mjolnirmight2 said: She Hulk. i cringe when she screams.
Dormammu said: I would happily sell my c4rol to stop seeing her in 99.9% of all PvP teams.
You know, I was looking forward to feasting on Carol/Medusa teams in PVP during Mordo's boost week on account of their passives, but I haven't seen a single one, yet. I've seen more teams with Medusa than Carol, but both have been nearly absent amid the sea of Mordo/4Cage teams I see everywhere. I'm not saying Carol isn't excellent or that she isn't everywhere in SImulator, but in normal PVP she's nowhere near good enough to compete with the boosted list in most of the weeks recently.
As for the original question, Juggernaut is my answer with not even a moment of hesitation. It's not that he's difficult to beat in PVE...he just sucks the fun out of the game.