I really like the Gunner, his internal dialogs are interesting, even if they don't play out in the game (yet). That's more your talent as a writer, I'm sure what ever you come up with will be compelling.
Cleric's and wizard's are my favorite archetypes. How do you work a death cleric in with the current history? Is he a mortician of the Christian tradition, or does he belong to a cult or a lost religion, or does he have a voodoo background? One of the last Zoroasters? Buddhist, Muslim, Jewish or Hindu?