All right, you could go with the DnD standard races, and yes, there's an evil race for ever "good" one. Or you guys could be special and try to create your own races playing a mix and match game. You take the one thing that a species is respected for, and corrupt it until it's almost unreconizable.
Humans (Adaptability) -> Crazy Mutant Things. (Chaos) [refered to as CMT]
Elves (Aestetics/Beauty) -> Drow (Racial Purity)
Dwarves (Utilitarian) -> Orc-Like Things (Expedient) [refered to as OLT]
The CMT are a race that, having embraced the natural chaos that mankind normally takes advantage of, was corrupted by it. Their are all sorts of physical deformities found among their populace, from the advantagous to the crippling, though many of the latter die a quick death, because the society has no place in its structure to support those who can't support themselves. Some CMT appear normal enough to sneak their way into human society, subverting the common good whenever possible, while others are fit only to attack the "weakbloods" directly. There is almost no society, with "tribes" forming for a specific purpose, and often disbanding afterwards. Most CMT live a short life, even for humans, but they also seem to sprout out of the ground like rabbits and other vermin.
Nothing really coming to mind right now, just think genocide though and you'd have it.
The OLT are a race that, though very mindful of their own laws, would rather pillage what they need from another city/town/tribe/nation than make it themselves. They are excellent warriors, with superhuman knowledge of how to quickly kill of their enemies that one can only gain from an excedingly long lifespan. No matter how well off they have it right now, if they need something, and can't easily hire someone to make it or get it for them, they will either kidnap someone or take the thing itself.
2. conducive to advantage or interest, as opposed to right.
5. a means devised or employed in an exigency; resource; shift: Use any expedients you think necessary to get over the obstacles in your way.
That's all I can think of right now. As for the class names, there's really not much I can think of to help you there.