#4. Dr. Issac Yankem, DDS.

Our number four most bizarre WWE superstar is, believe it or not, a former WWE World Champion and a shoo in for the hall of fame.
Glen Jacobs, the man who would eventually strike gold as Undertaker's disfigured brother Kane, was initially given the Issac Yankem gimmick when he debuted with WWE. Story line wise, he was Jerry Lawler's personal Dentist, and Lawler brought in the behemoth Yankem to help against Bret Hart, with whom the King was feuding at the time.
Issac Yankem was a dentist with stained, misshapen teeth. Whether this was an attempt at irony, or just meant to make him look more menacing, is unknown. What is known is that WWE dropped the Issac Yankem gimmick shortly. After a stint as New Diesel, Jacobs was turned into the masked Kane and the rest is history.