#2 Edge (2007-08)
Edge is the greatest World Heavyweight Champion in WWE history, winning the big gold belt a record seven times. He, and arguably Triple H, is the wrestler who is most synonymous with this title. He literally retired while holding it. The Rated-R Superstar enjoyed his best world title reign when he headed into 2008 as the world champion. He interjected himself in the Undertaker's classic feud with Batista and captured the title at Armageddon 2007 in a triple threat match, thanks to the debuting Curt Hawkins and Zack Ryder.
His heelish ways would carry on as WrestleMania was approaching. After a feud with Rey Mysterio, the Ultimate Opportunist would face the Undertaker in the main event of WrestleMania 24. It was a worthy show closer and certainly one of the Deadman's best matches at WrestleMania. Edge tapped out to the Hell's Gate, but he put in a performance that he could be proud of. It was a fitting end to an entertaining reign.
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It may have barely crossed 100 days, but Edge's consistency and character work make this the second greatest World Heavyweight title reign in the WWE.