#2 Chris Jericho

Inside and outside of the WWE, Chris Jericho is the definition of a success.
A multiple-time World Champion in the company, Jericho currently competes in New Japan as the IWGP Heavyweight Champion, and does all of this whilst balancing his touring schedule with Fozzy.
Never one to slow down though, it is likely that Y2J could return to WWE in 2019, presumably after he loses the IWGP IC Title.
Though it could be more interesting to see the master of the Codebreaker bring the title to the company, it's doubtful that WWE would allow another brand's belt on their programming.
Now at 48-years-old, Jericho isn't the spring-chicken he once was, but could still easily go with the top talent in the WWE today.
A final reign, perhaps his tenth reign as WWE Intercontinental Champion, would be the cherry on top.