6. Chuck Liddell
The Iceman Cometh. Chuck Liddell is widely regarded as the man who made UFC mainstream. He had a look and fighting style that engaged fans, the mohawk and bear combined with a ruthless aggression that was a marketers dream. He was very much the UFC's Stone Cold Steve Austin. The brand of Chuck Lidell is ready made to jump to WWE. He was good on the mic too, and selling his feuds. He had a legendary series of matches with Randy Couture and famous bouts with Tito Ortiz. There is no doubt that Liddell could have done well as the face of the WWE brand, but alas at 43 it seems unlikely. In fact if anything, he may be getting back in the cage again - he has hinted that he wants one more match.