Suggested by iKnowledge All Might is the symbol of peace and one of those characters who has nearly unfathomable super strength. His abilities are in a class of their own and I believe he would crush Melkor without much difficulty. Melkor may be able to grow to a huge size and has a lot going for him, but he really can’t keep up with All Might. He’d be speedblitzed and would eventually go down. Melkor doesn’t have enough power to stop this guy. All Might wins.