Better World Comics
The Vortell Imperium
Lead by the conqueror Nexus, the Imperium are a militarized society that travels the galaxy going from planet to planet and dominating them. Then they strip the world of its technology and resources and incorporating the natives into the imperium. They have yet to come to Earth itself in mass but individual from the Imperium have been here and members of EarthGuard have encountered them when on other worlds.