Daniel Cormier, Luke Rockhold, Gil Melendez, Jacare etc.... For me its got to be Cormier. I really believe he is the best heavyweight in the world and would beat Cain, although there never going to fight. It should be interesting to see if he can perform to the same level at 205 if he makes the cut down. I think if Cain loses the belt anytime soon then Cormier is the man to win it. Hopefully he'll perform well in the UFC and win a title.