Black hole of need?

How about just different shapes of people, with differing tastes. Some obsess over money. Others over art.

being so acoustic about languages you make a book that is a global hit

Great question. I'm not OP. But a bunch come to mind.

Disclaimer: Even in recent classic eras of science fiction, it wouldn't have been safe for authors (who need publisher trust to buy food) to get diagnosed as neurodivergent, so I feel like we're left with wether neurodivergent individuals embrace their work, rather than if the author ever acknowledged any personal neurodivergence.

Disclaimer: I'm not neurodivergent. I don't feel safe seeking a diagnosis. And things aren't binary, so what the hell. I do acknowledge it's interesting that I relate strongly with a bunch of these characters, and can bring them to memory quickly as some of my favorites...

With that disclaimed:

• "The November People" by Ray Bradbury comes to mind. It explores how classic Hollywood "monsters" would handle themselves as roommates, mostly through exploring their mental diversity rooted in their physical/cultural differences.
• Asimov's robot detective stories (start with The Caves of Steel) have protagonists whose planets effectively make them neordivergent anytime they visit another planet than their birth world.
• "Stranger in a Strange Land", by Heinlein, is about a neurodivergent (for Earth) young man who grew up as the sole human citizen of Mars.
• Philip K Dick's detective protagonist from "Do Androids Dream of Electric Sheep" (aka Blade Runner) is clearly neurodivergent, as is his wife.

Edit: As others have mentioned, Mary Shelly's Frankenstein, of course!

That's not entirely true. There's still good sci-fi being made. Look at the expanse, dark, altered carbon.

I dont know much about newer books, but I m sure there's good scifi writers out there still. What comes to mind is ready player one, red rising, pines, although these are all 10 years old by now. It illustrates that it's not just the era of Heinlein and Asimov that counts.

Greg Egan, Iain Banks and Sam Hughes are good stuff, if you haven't.

Also, there's this amazing new genre, "LitRpg". Basically fantasy where an rpg type videogame became real.

Most of it is the usual dreck but some of it goes hard sf, delving into the existential stuff.

A couple of the rationalists have even taken a swing.

Try

Mother of Learning

Death after death

Friendship is optimal

So ya, real development is still alive.

But she was reasonably well-adjusted

Bruh...

She kept her dead husbands heart and would carry it around with her

Ah, you've read Heinlein and Lovecraft.