#2 Bobby Lashley
After being pushed as the next 'guy' in WWE, Bobby Lashley decided to leave the company in 2008 to pursue a career in MMA. He made a brief return to wrestling in TNA in 2009, but was gone by January 2010 after accomplishing nothing, and being more focused on MMA.
Lashley made a surprising return to Impact Wrestling in 2014. Unlike others on this list, Lashley didn't drift too far away from the spotlight as he was a force to be wreckoned with in MMA, but being a major star in MMA and wrestling are pretty different, but thanks to some excellent booking, Lashley became a star in wrestling again.
Charlotte Flair to return and wrestle a CURRENT CHAMPION?
Lashley dominated Impact Wrestling for four years, where he was a 4-time Impact World Heavyweight Champion, with at one point during one of those reigns, also simultaneously holding the Impact X Division Championship and being the final King of The Mountain Champion. He also had a very impressive win/loss record, with big victories over the likes of Kurt Angle, Bobby Roode, Drew McIntyre, EC3, Jeff Hardy, James Storm, Austin Aries, Samoa Joe and fellow mixed martial artist Josh Barnett, among more.
Lashley has since returned to WWE, for what has so far been an underwhelming return. Hopefully he can replicate some of his Impact success.