#2 - Bradshaw
It's no secret that John Bradshaw Layfield has lit a few guys up in his time. Many regarded him as a bully back in the Attitude Era, and that crossed over into his later years with the company as well. For example, after hearing reports of The Blue Meanie suggesting that he was a bully on a podcast JBL beat the hell out of him during ECW: One Night Stand - for real.
But the biggest notch on Bradshaw's bedpost is probably his work during the Brawl for All tournament, where he proved himself to be a more than capable fighter. Sure he wasn't the best, but with some tweaking, he could have found himself in a comfortable position in a promotion's heavyweight division. That isn't a knock on his weight, either - it's just a fact.
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We conclude with the man who brought MMA into the wrestling mainstream.