Beterbiev would be good but Canelo went down again for a reason. His enhancement still has limits. Golovkin did beat Canelo at least once. If he does the same thing again he'll lose on the cards. There's still a chance for him to come out in brawl mode and get his vengeance. Take the strategy Lee was going to use against him, train for a five round war. If we all know you need a KO to win, who is better than Golovkin to go for that at 168 or under. He's the only one with the chin, skill, power and psycho to do it.