Heavyweight:
1. Andrei Arlovski
Light Heavyweight:
1. Wanderlei Silva
Middleweight:
1. Jorge Santiago
Welterweight:
1. ????
Lightweight:
1. George Sotiropoulos
Featherweight:
1. Jens Pulver??? Not sure, his sub skills seem down too!
Fighters who would not be top contenders if they had worse chins:
Heavyweight:
1. Cain Velasquez, if he had a bad chin, Kongo would have slept him.
Light Heayvweight:
1. Rampage
2. Shogun
3. Tito Ortiz
Middleweight:
1. Chris Leben
Welterweight:
1. BJ Penn
Lightweight:
1. Frankie Edgar
Featherweight:
1. Mark Hominick
Bantamweight:
1. Brian Bowles
2. Urijah Faber