YuYevon. He was a wimp. The only good move he had was Curaga which only healed him by 5000HP and I could do 9999HP damage to him a turn. Even with your Aeons gone he's easy. Choas is a close 2nd. I beat both of them first try. Ultimca was hard the first time but after that she was easy. Neo-X-death was easy as well. Beat him on my second try. All other Final bosses were hard. Although I havn't got to Sephiroth yet or havn't even played FF3. I don't know how you guys found Kefka easy. He was one of the hardest bosses I ever fought.