I have played all of those except for Ur-Quan. I didn’t like the combat or trade mechanics in Naev, but the storyline and the planet art is cool. I played endless-sky a lot, but at this point I just want to see the main storyline for it finished, but that will have to wait until MZ has the time to dedicate to it again. I have starsector, but it looks more complex than I would like.
Star Valor looks cool as hell. I can’t actually run it, since it’s Windows-only, but one of y’all might like it. If you liked the classic Escape Velocity games or endless-sky, this looks similar.