Nearly anyone from Rugby and Strongman.
Mariusz Pudzianowski plays Rugby, is the world's strongest man, and is a black belt in Kyokushin Karate (GSP is also a blackbelt), and has been training in boxing and catch wrestling. He could literally be twice as strong as Lesnar, and the grip strength of strongmen is outrageous. I'm pretty positive that Mariusz could break someone's arm or wrist by squeezing it. Seriously.
Plus his cardio is unmatched, he'd probably have the best muscular endurance in MMA, and he's lightning fast.
Nearly as strong as lesnar x2? the dudes like just the current worlds strongest man...dude won it with a damaged calf muscle
Sonnen On the spider
“If he wants to leave the division, leave the sport, who cares, Beat it, nobody tunes in to watch him anyways, and his little fake ‘I don’t speak English.