#2 The Undertaker

In the last three decades, the only constant in the ever-changing world of the WWE has been The Undertaker. Having debuted at Survivor Series 1990, The Undertaker is without a doubt the greatest character in the history of professional wrestling. That the person behind the character, Mark Callaway is able to perform this character even 28 years after the character debuted is truly remarkable.
In spite of being one of the greatest characters in the business, The Undertaker is also highly underrated as a performer. He has had a wide array of move sets in his arsenal and is one of the few superstars who have debating finishers and submission moves on the form of the tombstone piledriver and the Hell's gate. The most interesting part of his career is the fact that he rarely breaks kayfabe which is a trait hard to find in today's time.
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The primary reason for the Deadman not being able to prove himself as a great performer was the fact that he was put in matches with the likes of King Kong Bundy, Psycho Sid and Giant Gonzalez who couldn't even wrestle to save their lives. But in the later part of his career, The Phenom faced off against Edge, Shawn Michaels, and Triple H all of whom brought the best of him. If you take a closer look at the Carrer of the Undertaker, you will see that didn't accomplish anything substantial till he was in his mid 30's and only got better in the ring as he grew older.