Cormier is one of few if not only active fighters to prove he can fight at the highest level in two weight classes. dude was ragdolling legit top 10 heavies and LHW's. if he wasnt besties with cain I think he is the best best for two division champ.
Hell if he 25 instead of 35 and hadnt wrecked his body cutting weight throughout his wrestling career he definitely has the build to fight at MW and could win that belt too imo. hes so versatile