#4 Rey Mysterio
Soon after Eddie Guerrero died, WWE came up with a storyline that saw Rey Mysterio promising to win the top title on SmackDown Live in memory of his best friend. The Royal Rumble match in 2006 saw Mysterio enter in at #2 and compete for almost an hour in the free-for-all. He managed to eliminate Randy Orton to win the match, but was soon robbed of the opportunity by The Legend Killer at No Way Out. SmackDown GM Theodore Long inserted Mysterio in the World Title match at 'Mania, making it a Triple Threat bout featuring Rey, Orton, and World Champion Kurt Angle.
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In one of the most emotional moments in WWE history, Rey Mysterio pinned Randy Orton to win the match and become World Heavyweight Champion for the first time in his career. Years later, Mysterio won the top title on two separate occasions, cementing the fact that Vince McMahon had full faith in him as a main event Superstar.