#1 Dan Severn
For those who do not know him, Dan Severn is one of the modern pioneers of Mixed Martial Arts. What is even more unique about Severn is that his careers in MMA and wrestling were not really divided, but rather, simultaneous.
He even became notorious for walking out to his MMA fights with his wrestling Championships while walking out to his wrestling matches with his MMA Championships.
Charlotte Flair to return and wrestle a CURRENT CHAMPION?
While Severn was never really a huge success in WWE, his presence in the ring had to be seen to be believed. Dan 'The Beast' Severn fought in multiple promotions throughout his entire career including UFC. He was around and fighting when MMA was not really that popular. While he is technically retired from MMA, he was supposed to return for a huge fight against Ken Shamrock. However, an injury to Shamrock put an end to his return to the cage.
Severn is still active in wrestling and occasionally makes appearances for Indie promotions. He is a member of the UFC Hall of Fame and even held the UFC Superfight Championship. His accomplishments in wrestling are also manifold, although his time in WWE did not do justice to his abilities.
Record: 101-19