In order to answer the question of what, you'd first need to answer the question of where.

Ishgard for Dragoon, Ala Mhigo's got monks, Far East has samurai and Norvrandt doesn't have a signature class associated with it but, y'know, "Warrior of Darkness" is a perfect fit for Dark Knight. That being said, all of these classes have also been physical. I doubt he'd pick up spellcraft any time soon. He also has, as mentioned, Warrior and Bard already under the belt.

I've got no real idea where we're going, all I know is that when Garlemald hits he's definitely gonna gunbreak.