#4 Dolph Ziggler (from a male cheerleader to the WWE World Heavyweight Champion)
Nicholas Nemeth made his WWE debut back in 2006 as Nicky, a member of the Spirit Squad which was a group of 5 male cheerleaders. As a heel faction, the Spirit squad won the Tag titles. They were involved in a feud with a reunited DX and were constantly beaten up. The audience didn't take them seriously for the most part.
As the squad began to drift off, Nicky showed promise and was sent to OVW to be repackaged. In 2008, Nemeth re-debuted on RAW as Dolph Ziggler. Over the time, he grew as a solid performer and was involved in a number of major storylines. He went on to win the audience over with some fabulous performances and became the World Heavyweight Champion in 2013. Dolph went on to win a number of championships in WWE and is well regarded for being a terrific worker.