#2 Ken Shamrock
For any fans of WWE during the Attitude Era or any modern Impact Wrestling fans, Ken Shamrock does not really need any sort of introduction. Billed by WWE early in his run as "The World's Most Dangerous Man", Ken Shamrock was really a presence in the world of wrestling. He came into WWE after already having some knowledge and experience in wrestling from his days in Japan. He used the Ankle Lock as one of his finishers long before Kurt Angle started to use it.
He was a part of The Corporation and worked on behalf of the McMahons for a while. He ultimately left WWE and for some odd reason, has since been apparently forgotten by the wrestling promotion. Currently, at 56 years of age, he is still making his name in Impact Wrestling.
Charlotte Flair to return and wrestle a CURRENT CHAMPION?
However, Shamrock's real accomplishments lie in Mixed Martial Arts.
He started his MMA career in Pancrase, but it was not before long that he was a part of the UFC 1 tournament. Shamrock would regularly compete in UFC and Pancrase simultaneously and is known for being one of the early pioneers of the sport. He is the inaugural UFC Superfight Champion and holds the record for the longest fight in UFC history with Royce Gracie going into 36 minutes. He is also a part of the UFC Hall of Fame.
Record: 28-17