It's got to be Star Trek (Next Generation/Deep Space Nine/Early Voyager too) and Battlestar Galactica. I've tried watching The Expanse several times and I have no idea why I can't get into it - everyone recommends it!
Have you watched Star Trek: Strange New Worlds? Season 2 just started and it feels like a return to the golden age of Trek instead of the gritty overly dramatic direction Discovery and Picard went.
I haven't! Unfortunately it seems to only be available on paramount+ here and it's not one of the streaming platforms I sub to. I did get very tired of the gritty, dark take on Star Trek. I was purely watching for the Utopian ideals originally but I'll give almost anything with a Star Trek label a chance.