First thought after seeing this list is that there really aren't a lot of great bigs in the conference. I think Obekpa can be right up there with any of them. Pinkston is a college big, but it's almost unfair to list him on here because he can do so much on the perimeter....definitely #1. Smith, when he wants it, can be the best of the true bigs anywhere. But who knows what kind of effort G'town will get from him on or off the court.
Stainbrook is steady, but I think you are overrating him a bit. He looked really good against us because we had no skill down low. I'd add Kameron Woods of Butler to this list. I can see them being one of the most improved teams in the conference if not the country (with URI). He led the Big East in boards last season. Defensively, he goes for the block far too often instead of gaining good defensive position, but he does rebound the hell out of the ball.