5 WCW World Champions that never won a WWE Title 

#4 Big Van Vader a.k.a. Vader

It's Vader Time (Pic Source: WWE)

Big Van Vader a.k.a. Vader came to the WWE in 1996 as a monster heel. He had feuds with the likes of Shawn Michaels, The Undertaker, and Kane. Before all this happened, Vader was a three-time WCW World Champion as well as three-time NJPW IWGP World Heavyweight Champion.

It's fair to say that in WCW, at least in the United States, Vader had his most success. He feuded with the likes of Sting, Ron Simmons, Ric Flair, and Hulk Hogan. As a heel, Vader was as good or better than people could have imagined. But things didn't work out that way in WWE.

While efforts were made to establish him as a legitimate heel, such as destroying WWE President Gorilla Monsoon, his feud with Shawn Michaels turned out to be a wash. At the time, Vader believed that Michaels' attitude was just not right and was just a difficult person to work with at the time.

He was booked to beat Shawn Michaels at SummerSlam 1996 to win the WWE Championship, but it fell through. Vader ended his WWE run on a string of losses in 1998.