I'd have to go with Dragonite EX, simply because not only can he stop trainers, but he can deal 8 damage counters that are unavoidable, which could knock out more than a delta Tyranitar EX could do in one turn, considering that Tyranitar EX takes two turns to set up. But then again, I'm a huge fan of Dragonite EX's second attack, because those damage counters can build up, and it gets around resistance and metal as well.