#4 Randy Orton
Randy Orton is at that stage of his career where it does not matter if he is a face or a heel, he is beyond that. The 14-time world champion is still an excellent slimy heel, but he has become one of the most popular Superstars on the roster thanks to his legendary status. Whether or not he turns fully babyface, Orton will remain loved among the WWE Universe.
That brings us to the fact that he still needs his shot at vengeance against Brock Lesnar. Over three years ago, at SummerSlam 2016, Lesnar absolutely pummelled Randy Orton and busted his head wide open en route to a TKO victory for him and a concussion for the Viper. A match between the two now would certainly be an improvement from last time.
When they are motivated and on their game, Brock Lesnar and Randy Orton are among the greatest WWE Superstars of all time. And the good thing is that the story is there for them to be invested in. This would be a great big match for the Royal Rumble pay-per-view. Also, we are yet to see that F-5 to RKO reversal.