The Korx are a good pick; they won't go all WAAAAAARRRRRR on you, since they are mostly traders; but if you pick a diffrent alignement they JUST might attack; Granted, the only time they declare war on me (I play Terran), they claimed someone paid they a good chunk of creds to get in trouble with us.
Or get a military race (Taurians are ok) and maybe have the Altarians in your team to back you up: they research, you bombard.
