#3 Baron Corbin
I know what you're thinking, but please, hear me out.
When Baron Corbin replaced Kurt Angle as the acting General Manager of RAW, the change was a breath of fresh air for the lone wolf.
Cutting his hair and donning a waistcoat, the Constable was an effective heel authority figure, in a time where it is very difficult to get fans to boo heels.
Having Corbin upset Universal Champion Seth Rollins would be a true shock, and Corbin could do wonders as the top heel on Monday Nights.
Or even having Corbin jump ship to SmackDown could prove to be effective, as it was on the blue brand where he last held championship gold.
Whatever way Corbin goes, having a genuine heel who fans want to boo is never a bad thing, and could help solidify an opposing babyface.