I'm a fan of Bisping and see him as a clear top 10 possibly top 5 MW but realistically I can't see him beating Weidman. Stylistically, Bisping I think will edge past Belfort with a boring close decision win playing it safe and could definitely do the same against Belcher. However, Weidman is too well rounded and too fantastic of an athlete that I feel he would overwhelm Bisping and put a savage beating on him.
As for the rest of the elites, we all know it'd be a highlight reel KO for Silva considering all the other "well rounded" fighters who prefer to stand did against him. I also think Okami would be too big and strong of a grappler for Bisping to handle IMO and Sonnen would do better against Bisping the second time around.