I don’t know if you can find four better pro wrestlers for a cage I Quit match than Ric Flair, Sting, Terry Funk and Mr. Muta. The amount of pain and even torture these four men were able to put themselves through because of their conditioning, physical strength and just character and courage was simply unmatched by almost anyone else who has ever been a pro wrestler. Two other guys I would thrown into this group would be Hulk Hogan and The Undertaker for the same reasons as these four men.
Ric Flair was seen as a classical if not classy pure wrestler who made most of his living just wrestling in the ring and not getting into street fights like this and most of that is true. But he beat the great Harley Race for the NWA World Heavyweight Championship, a match where he may of lost on points, but beat Race in it. He was in a lot of cage matches, including with The Horseman against The Road Warriors and The Koloffs and did very well in those matches. Sting could wrestle or fight anyone anywhere. It didn’t matter to him and Terry Funk was a street fighter who could wrestle. Similar to Mr. Muta.