Cro Cop all the way...yeah, he won the Grand Prix, but that's relatively different.
I'll go with Rizzo as well, but I've gotta question the original thread: Tank Abbott and Tra Telligman? Telligman's got guts, but he never really progressed that much as a fighter...yeah, he beat Brad Kohler and almost knocked out Rizzo, but he never was all that extraordinary.
And Tank...he has a 9-12 record. He's lost six of his last seven fights. Paul Buentello KO'd him in 43 seconds. He lost to Cabbage and then beat him in a rematch. Neither of those two facts are much cause for pomp and circumstance. Don't get me wrong, I give the guy some credit for popularizing the UFC in the early days; he was one of its first great characters. The sport, however, passed him by years ago.