Not at all the most worthy of praise or complete fighters, but just based off the amount of wins they have to be mentioned.
Tony is often saluted for his 12 straight wins but hey, these guys came close:
Jake Shields - from 2005 to 2013 he went 17-2-1 with wins including Okami, Condit, Daley, Lawler, Hendo, Woodley and Maia.
Jon Fitch - started in UFC in 2005 and for the next five years he went 12-1 with his only loss being GSP. And even though I don't really like bringing up late career fights, the fact that he during 2015-2019 when beat some other vets like Okami, Shields, Daley and a draw against Rory shows that he had some longevity. Terribly boring though.
Chael deserves a mention just cause he came close. One of the few people to ever have such a dominant title fight against a prime GOAT, only to lose in the last minute. Won 4 rounds and I think he got multiple 10-8 rounds at least by one of the judges. Doped up but still.