All of them.
My last campaign that I was actually able to play was Spelljammer. I used Ravnica for random aliens (Kraul, Krasis, Horrors, etc), Theros for the subclasses (one player was an Oath of Glory Paladin) and races, Wildemount for the world and magic (dunamancy works very well in space), Eberron for the artificer, races (shifters, changelings, kalashtar, and warforged all work well in a space setting), magic items, and monsters (dolgrim, dolgaunts, quori, warforged titans/colossus), and the SCAG for Toril as a homeworld.
In fact, as of our last session, we have used every published D&D 5e book for the campaign (Ghosts of Saltmarsh for the ship rules, Dungeon of the Mad Mage for the space rules, Volo's for Neogi, Mordenkainen's for Giff, etc).