Foundation on Apple TV is really good. Fills a The Expanse shaped hole nicely. It got some mixed reviews initially as some fans of the books criticised some of the changes they made but having never read the books I enjoyed it on its own merits. Looks fantastic and Lee Pace is perfect for the psycho emperor role.
It interesting as some of the ideas can seem derivative until you remember it pre-dated a lot of other classics. If you see elements of 2001, Dune and indeed The Expanse, it's because they were based on Foundation, not the other way round. But I found that to be interesting, rather than distracting.