#1 The Undertaker
No explanation necessary. The most dominant and fearsome performer in the history of WWE is the only monster who can top this list.
The Undertaker debuted with a bang at Survivor Series 1990 as the mystery partner of Ted DiBiase's Million Dollar Team. The 7 foot tall, Undertaker quickly eliminated WWE Hall of Famers Koko B Ware and Dusty Rhodes before he was counted out.
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The Deadman was undefeated when he was named the challenger to Hulk Hogan's WWF Championship at the following year's Survivor Series, wherein he defeated the "Immortal One" to win his first World title.
His reign and his undefeated streak was ended six days later at the Tuesday in Texas pay per view event.
Undertaker defeated a long line of mammoth monsters during his early tenure in the company. Such behemoths as Giant Gonzalez, Yokozuna, King Kong Bundy, Mabel, Diesel, Vader and Sycho Sid all fell to the "Phenom."
The greatest challenge of Undertaker's career came in the shape of his larger brother, Kane. Undertaker would eventually overcome being set on fire by his younger sibling to beat him at Wrestlemania XIV and in the first ever Inferno Match.
The Deadman soon became yet even more demonic as he altered his look to more closely resemble Satan and formed his satanic Ministry of Darkness, which memorably attempted to marry Stephanie McMahon in a "Dark Wedding."
Over the course of his 28-year career, Undertaker remained undefeated at Wrestlemania for 23 years before his streak was ended by Brock Lesnar.
However, Undertaker had continued to dominate the competition ever since, most recently competing in the main event of WWE's first live pay-per-view in Australia at WWE Super Show-Down.
Still going strong at the age of 53, The Undertaker's career will never be matched.