#2 Drew McIntyre
Drew McIntyre is undoubtedly the most vicious and dominant wrestler in the WWE today. He is extremely talented, and, has squashed each and every wrestler he has faced. McIntyre is for sure a future World Champion in WWE. He has the ability to become an all-time great and is one of the top contenders to retire John Cena from professional wrestling forever.
McIntyre against John Cena would be really entertaining. If anyone has the guts to step and fight John Cena it is Drew McIntyre for sure. John Cena would not mind getting defeated against McIntyre. He can pass the torch to someone who is really deserving and McIntyre is the best option.
It would be similar to the Undertaker's loss against Brock Lesnar and Roman Reigns at WrestleMania. If John Cena agrees to this match, it should be one of the grandest farewells for any wrestler on this planet.