The best Fighter after Osian is definitely classic Barst. He breaks the mold of traditional Fighter Growth rates and is respectable in every stat. And by classic Barst, I mean the Barst in the first two games in the franchise, not their remakes. His growth rates took some heavy hits in Shadow Dragon and New Mystery of the Emblem. He's still better than Bord or Cord but not nearly as good as he originally was.