#2 Triple H
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Triple H is a WWE icon, who played a key part in the Attitude Era, becoming one of the greatest heels in WWE history. In the latter part of his career, The Game has helped grow the WWE from his backstage role, helping NXT grow from a developmental territory to one of the most exciting pro wrestling shows.
But, before he became a part of D-Generation X and had his incredible feuds with the likes of The Rock, Stone Cold Steve Austin, and Mick Foley, Triple H was a part of WWE's rival, WCW.
Between 1994 and 1995, Triple H wrestled in WCW as Terra Ryzing and later as Jean-Paul Lévesque. But just a year after signing with WCW, Triple H joined WWE after Vince McMahon was impressed with his work in the ring.
He spoke about why he wanted to leave WCW in a recent interview:
"Things were such a mess there. Even Nitro hadn’t started yet but you could see the mess coming. And everybody that had come there or gone to WCW from New York, from WWE, was like, if I was asking anybody, my contract’s coming up, anybody that had been up here, was like, ‘Dude, get out of here. Go up there, Vince will make you a star.’"