Male: Bao-Dur, without a doubt. Sion would be hot (in that dangerous, steal-your-wallet-at-gunpoint sort of way) if he didn't have the bad eye. Atton is pretty, but he and the rest of the males are too bland or whiney. Bao has a great body, all of those tech skills, and he worships the ground you walk on (whether you're male or female). Who wouldn't want a guy around that worships you, and has the body and skills??
Plus, he has that magic hand...
Female: Visas has the best voice, but Handmaiden has the body (and is game for putting on the dancing costume). But my vote would be the Twi'leek bounty hunter twins!