For ally team, I would go Diablo for the tank, as he has some strong point and click cc. Uther would also be a good pick, especially with divine storm.
I think a strong autoattacker would also do well here. Tracer gets absolutely smacked by AA damage since she can’t dodge it.
So I guess my final answer is Diablo (if map allows), Uther and Raynor(?)
And for the love of all that is holy, that Ming better go E build.