think you want The Culture series

Possibly the void trilogy from peter f Hamilton.

Another one with different cultures is the expanse, by James s.a. Corey. This is more different around the belters and whatnot.

Dune and the freemen are amazing. Some of the earlier parts (this is a massive topic!) are really different, with the bene Gesserit and fremen, tleilaxu gholas, etc

Certainly the culture, with it's post-scarcity absence of an economy stands out. I have read any from le guin, yet.

Speaking of Ursula Le Guin and envisioning a world beyond capitalism, I'll always love her speech from the 2014 National Book Awards:

Thank you Neil, and to the givers of this beautiful reward, my thanks from the heart. My family, my agent, editors, know that my being here is their doing as well as mine, and that the beautiful reward is theirs as much as mine. And I rejoice at accepting it for, and sharing it with, all the writers who were excluded from literature for so long, my fellow authors of fantasy and science fiction—writers of the imagination, who for the last 50 years watched the beautiful rewards go to the so-called realists.

I think hard times are coming when we will be wanting the voices of writers who can see alternatives to how we live now and can see through our fear-stricken society and its obsessive technologies to other ways of being, and even imagine some real grounds for hope. We will need writers who can remember freedom. Poets, visionaries—the realists of a larger reality.

Right now, I think we need writers who know the difference between the production of a market commodity and the practice of an art. Developing written material to suit sales strategies in order to maximize corporate profit and advertising revenue is not quite the same thing as responsible book publishing or authorship. (Thank you, brave applauders.)

Yet I see sales departments given control over editorial; I see my own publishers in a silly panic of ignorance and greed, charging public libraries for an ebook six or seven times more than they charge customers. We just saw a profiteer try to punish a publisher for disobedience and writers threatened by corporate fatwa, and I see a lot of us, the producers who write the books, and make the books, accepting this. Letting commodity profiteers sell us like deodorant, and tell us what to publish and what to write. (Well, I love you too, darling.)

Books, you know, they’re not just commodities. The profit motive often is in conflict with the aims of art. We live in capitalism. Its power seems inescapable. So did the divine right of kings. Any human power can be resisted and changed by human beings. Resistance and change often begin in art, and very often in our art—the art of words.

I have had a long career and a good one. In good company. Now here, at the end of it, I really don’t want to watch American literature get sold down the river. We who live by writing and publishing want—and should demand—our fair share of the proceeds. But the name of our beautiful reward is not profit. Its name is freedom.

Also her book The Dispossessed might be just the thing you're looking for.

Brave New World? Asimov's Foundation is a good choice too.

ok this is a very fanciful one but piers anthony has some things but they sorta are drawn out by the fantasy. xanth, adept series, kirilian quest ones I recall had some interesting interactions.

thats like basically heinlen's main thing. almost all his books has some sort of unique social structure. They by and large are only the same for books in a series. I dunno about foundation. feels more like a cabal or something. You make me want to read more Le Guin and I don't think I have robinson so will need to check out. problem is I don't read much anymore (time. I need to be like that twilight zone guy but then don't break my glasses.)

Hey there! You've got an exciting journey ahead, diving into the world of thought-provoking sci-fi. If you're looking for a fresh perspective on societal organization, Ursula K. Le Guin’s The Dispossessed is a fantastic starting point. It explores an anarchist society in a very engaging way.

Another great pick is Kim Stanley Robinson's Mars Trilogy (starting with Red Mars). These books delve deep into the political and social structures that emerge as humans colonize Mars. Additionally, Octavia Butler’s Parable of the Sower is a gripping read that imagines a future shaped drastically differently from our own.

You might find Snow Crash by Neal Stephenson quite interesting too. It's a wild ride through a society that's been radically restructured by technology and corporate influences.

Honestly, you can’t go wrong with any of the authors you mentioned as well. They all have unique takes on how the future might handle societal organization. Enjoy exploring these worlds!