Sith Inquisitor: Twi'lek isn't bad considering you were enslaved but other than that human works. Anything that isn't Pureblood. Why would a Pureblood be enslaved?
Sith Warrior: Pureblood.
Imperial Agent:Chiss
Bounty Hunter:Maybe cyborg? I don't exactly know. Human works too.
Jedi Consular: Togruta really fits this one in my opinion. If you get a nice appearance it looks great. If you don't mind no helms, that is.
Jedi Knight:Miraluka
Trooper: I would say human. I'm not for sure though.
Smuggler.Twi'lek all the way. Need I explain more?