Well I think I fit right in here. I refer you to my profile pic. Abbott got screwed a lot early on (I refer you to Don Frye and Oleg both having their sparring partners take very suspicious losses in their tornaments before fighting Abbott, fighting Ferrozzos 330lb ass with a bad knee, coming off knee surgery to fight gassed up Vitor) but he never came out and whined about it like virtually every other fighter (especially of the modern day) does. The guy was something we haven't seen before or since in mma and likely never will due to the heavy rules and the attitude of the newer generations. Tank Abbott, in a sense, is everything that's missing from modern mma. He wasn't some fake tough guy who did a bunch of artificial trash talk and lived a white collar life, he was headstrong, he was rabid in the cage, he didn't fail drug test, he didn't make excuses, he didn't need someone to teach him how to fight, and he genuinely enjoyed fighting. A lot of people actually hate Abbott and use him to represent the dark ages of mma, but their problem really is that they are looking at him as an mma athlete not as a fighter.
KJ Noons, Dan Bobish, and Eric Esch might also fall into this category.