All the Frank Herbert novels, Heinlein's stuff, Roger Zelazny, Asimov's Foundation series, Clarke, Gabaldon for time travel and Scots history.
Herbert was a rabid anti-Semite, but yeah, read ‘em all, back in the day.
Heinlein was good early on, but then he got wrapped up in nudism, homosexuality and incest. Too gross for me.
Azimov - meh
Zelazny - meh
Le Guin - meh
Somebody once asked Ted Sturgeon why 99% of science fiction was such crap. Never more true than today, as far as the genre goes. (Ted allegedly replied: “99% of everything is crap”.)
This has gotten way off topic. I’ll send the rest privately.
Gotta go do morning medical stuff and get some breakfast.