very, very few, sadly. if everyone stopped cutting so dramatically it might be different, but the cutting weight game is so stacked that there are very few "exceptions that prove the rule"
Hendo has proven to be better at a heavier weight.
Couture would have been perfect for a 220 division but acknowledged that he went down to 205 b/c he was tired of fighting 240+ lb wrestlers.
A Silva obviously did pretty well when he moved from 170 --> 185
but with so many others cutting 6%-14% of body weight, it makes it tough to stay at a healthy weight and fight guys that outweigh you so dramatically. to repeat, very few "exceptions that prove the rule"