It's been awhile since we did one of these. My choices come from the DS version.

Monk - cause they are overpowered beasts and work exactly like FFI's monks
Red Mage - probably the most broken version of the class I've ever sen in the series.
Geomancer - Surprisingly powerful with some great spell selections and they can actually take a beating.
Dark Knight - cause it's a freaking Dark Knight and soul eater is nasty
Bard - Surprisingly useful and probably the best support mage
Ninja - hell yeah!
Devout, useful healer and incredible magic resistance
Dragoon - Cause it's a freaking dragoon with double spears of DOOOOOOOMMMMMM!!!!!!!!
Black Belt - a stronger Monk with the best HP growth? I'm in!