By Hutt enforcer I meant the Weequays, Gammoreans, and their Hutt commanders. If they have young Hutts, well, those guys can move. But if you want, it could be "Hutt Societies." Might make more sense, anyway.
But, here you go for more. The Rodians, Duros, Twi-leks, and Collicoids.
Collicoid: (these are the creatures that made the droideka)
Droideka (self explanatory, needs Collicoid race in city, but not state race)
Collicoid Factory (allows Collicoid Droideka, and Collicoid Factory)
Collicoid Droideka (Better than normal droideka, spreads Collicoid)
Collicoid Frigate (huge transport room, not great strength)
Rodians
Rodian Bounty Hunter (Self explanatory, can enslave, spreads Rodian)
That's all I can think of that they are famous for. Anything else, really?
Duros
Duro Orbital City (+production, creates pollution)
Duro Beurocrat (Spreads Duro, something else)
Twi-leks
Twi-lek Slave (requires Slavery civic, and Twi-lek non state race, worker type unit, spreads Twi-lek)
Twi-lek Dancing Girls (city improvement, +happiness, something else.)