Well, the list doesn't really hold much water with me. Randy is on it, and he never got to fight Fedor before he was fed to a much larger, younger fighter that hadn't beaten a single top ten fighter, a 3 fight carreer, but was perfectly matched to beat Randy.
So maybe the UFC doesn't care who you are. They just care about equating Ultimate Fighting with MMA.
Don Frye's Mustache > Kimbo's Beard