Anyone and Everyone will lose eventually, Silva has lost before - I'm sure he will again the question is just who and when.
Paulo Filho might be a game opponent if he moved to UFC from WEC.
Cung Le is someone lots of people have hyped, I doubt he'd move from Strikeforce to UFC and I'm not convinced he's the force his fanboys make him out to be.
I'm not convinced that Lawler, Marquardt or Okami would fare any better than Franklin.
Who knows, maybe with a few more fights at MW Bisping might be in line for a title shot and have it in him.