Games like Galactic Civilizations III: Mercenaries

If you finished Galactic Civilizations III: Mercenaries, the closest matches are Stellaris, Endless Space 2, Age of Wonders: Planetfall, Galactic Civilizations II: Dread Lords and Distant Worlds: Universe. All 8 share its turn-based strategy (tbs) genre and are ranked by how closely their themes and modes overlap.