Heavy
Wren (Phantasy Star IV) vs Viese Blanchimont (Atelier Iris 2: The Azoth of Destiny) - What Tal said.
Middle
Snow Villiers (Final Fantasy XIII) vs Cornet Espoir (Rhapsody: A Musical Adventure) - Cornet's not bad, but Mr. Villier's stalling game surely spoils her. The Sentinel game off of Snow's stats might be enough to get him to Low Heavy? He just tanks too well for a lot of Middle (except for that whole status problem, but that applies to a lot of Heavies, too).
Light
Filo (Final Fantasy XII: Revenant Wings) vs Bibarel (Pokémon) - Sure, Flying over Melee works, and Bibarel trying to play Mage/Ranged is just sad...