Based on who I've seen, it would have to be Verrah and Strongbad.
Verrah is a very good team pyro, and I believe that either he has mastered the Airblast or I'm too freaking predictable as Soldier, probably both.

Strongbad because he's the best Spy Checker I know, and I believe that aspect of playing Pyro has been neglected here. I've never been backstabbed with him on my team when he has been alive.