#1. CM Punk

Let's face it: CM Punk is currently the biggest name in Professional Wrestling. Although he hasn't wrestled a single match in the last four years, you can still hear his name being chanted all around the arena by the wrestling fans. He is also considered by many observers as the greatest professional wrestler to step foot inside the squared circle.
The Voice of The Voiceless is a former 5-time World Champion, Intercontinental Champion, World Tag Team Champion and ECW Champion and only person to win Money In the Bank twice. He is also considered the best WWE Champion in history holding it for 434 days making him the longest reigning WWE Champion of the modern era.
Look who just shut down all of Tony Khan's critics! More HERE.
CM Punk has bad blood with WWE. He recently won a lawsuit against Chris Amann(doctor working for WWE). He has also stated that he has no interest in returning to Professional Wrestling World, possibly due to WWE's booking decisions. But one thing is for sure, if WWE manages to sign CM Punk and allows him to land another Pipebomb, then Raw ratings will be on top and where they haven't been ever.