that depends... do you wanna be good at pvp AND pve? or just pvp? if just pvp, swordsman or crane, if both then turtle or fighter... also, do you wanna be a distance fighter i.e. fight from a distance or fight up close and personal.
just pick turtle we have good skills for pvp like : sleep, slow(only for Close combat people) sudden stun,defense break(532 physical 532 energy) strong attacks and etc.