Shadowspawn

Shadowspawn was an Imperial Inquisitor and later Emperor's Reach during the Galactic Civil War, and later became an Imperial warlord, holding the Inner Rim Territories planet of Mindor as his throne world. He claimed the title of Lord Shadowspawn and sought to create the Shadow Empire, and Imperial splinter faction, as the galactic government. He was skilled in the Dark Side of the Force, and in lightsaber combat, as well as being a good tactician/strategist. His attacks almost brought down the New Republic, as he unified the other factions and the Imperial Remnant under him, ending the Imperial Civil War, in 12 ABY. However, he was defeated the following year by Luke Skywalker following an attack on his throne world.