I dunno shane carwin was a pretty good fighter. Alistair overeem isn't bad either.
Both roided, both have done bodybuilding. It is dependent on the skillset, not the physique.
Although being strong is advantageous in a fight, don't let anyone convince you otherwise. A big guy with an equivalent skill set will always crush a smaller guy with the same skills.
The problem is most bodybuilders just think they're tough

.