Dave Herman was another. He was kind of a freak athlete who made the Indiana D-1 wrestling team without ever wrestling in high school. He mostly trained in his garage and was 21-2 when he came to the UFC. (One loss a DQ against Sokoudjou in a fight he was winning and another loss in a fight he was dominating but totally gassed--a sign of his lack of serious training). There was a video of him outrunning an NFL running back in foot race on the streets of Nashville. But he was a headcase who never learned very basic boxing and striking defense, preferring instead to make up his own kung fu movie kicks (see his fight with Ron Waterman). The fancy/unorthodox stuff would've been a good addition if he was more grounded in fundamentals.
Come to think of it, Sokoudjou may have been another--KO power in his hands and feet and good judo, but not much else. He had the athletic ability and potential to be really good with more well-rounded training. I'm not sure if he or his training schools or both were at fault. He never evolved from the guy who KO'd prime Arona and Lil Nog but then got exposed by Machida.
I'd also add Tank Abbott as he was very strong when he started (watch him in 1995, not 2005), had an All-American juco wrestling background and at least a little boxing training with Roy Nelson-like KO power. That was a good combo for the early days of NHB. Like Herman, though, he liked to brag about how little he trained and how he'd come straight off barstools for a fight.
