HW- Cain.
LHW- Hendo, the guy is well into his forties and still knocking guys out in the UFC.
MW- Weidman. Finished the MW GOAT. Twice.
WW- Gotta go with Diaz. He has lost fights but I've never seen him really get his ass kicked. Even when he loses its because the other guy has a smart strategy, but he never gets it really put on him.
LW- Jim Miller. Crazy tough blue collar guy who can fight anyone in the division anywhere and have a chance to win.
FW- Frankie Edgar. Spent most of his career beating up guys bigger than him.
BW- Barao. Hasn't lost since 05. Pretty much all you need to know.
FLW- Mighty Mouse. Keeps getting better, finished two tough guys in a row, and the Benavidez KO was spectacular.
Honorable mention: Cowboy at LW for his obvious love of a brutal sport, Condit at WW, and JDS at HW.