#2 Rey Mysterio
Frequently referred to as “The Biggest Little Man” in the history of WWE, which in itself should tell you all you need to know, regarding how unlikely it was that Rey Mysterio would ever hold a heavyweight title in WWE. Not only did he achieve this, but he did so three times, twice becoming World Heavyweight Champion and winning the WWE title once.
His first run as champion came at WrestleMania 22, after pinning Randy Orton in a Triple Threat Match for the World Heavyweight Championship that also contained Kurt Angle.
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This title run, however, whilst somewhat surprising, was somewhat foreshadowed by WWE turning Mysterio and Orton’s feud into a way to transfer fan sympathies over the recent and tragic demise of Eddie Guerrero, onto Mysterio.
A more surprising example of Mysterio holding the top prize in WWE came in 2011, shortly after CM Punk had left the company and taken the title with him. WWE decided to ignore Punk’s claim to the WWE title and simply crown their own champion, and so a tournament was devised.
At a later stage of his career, Rey exceeded expectations by defeating The Miz in the final to win the WWE title. He inexplicably then put his title on the line against John Cena later in the night and was predictably defeated. He never really recovered after this point, with a spate of injuries and suspensions blighting the remainder of his time in WWE.