I gotta go with Final Fantasy 6. A large cast of characters, each one play differently, and had there own personalities which made them more badass. The story was amazing, it was one of the first games I played that can get an emotional draw from you (the opera scene, and Celes when she wakes up on the island with Cid, where he dies and she breaks down and takes a leap of faith of the side of a cliff, among other things.) And of course Kefka was awesome because he wanted to destroy the world as everyone knew it and PULLED IT OFF.
Number 4 was also pretty good, and of course 7 makes an appearance in my top 3. Thinking on it my order probably goes
FF6
FF7
FF4