I could write fave authors and stories all day.
But I'll just give ya a few to start with.
The Classic Masters of Sci Fi.
Arthur C. Clark( think Space Odyssey 2000)
One of my personal fave authors. He did Sci Fi and great horror and made it look easy.
Philip K. Dick
Piers Anthony( he does a lot of fantasy too)
Ursula K. LeGuin(she's great)
Philip Jose Farmer
Edgar Rice Burroughs
Harlan Ellison(he's too dark for some people. I think he could school Stephen King on how to do horror LOL)
That should keep you busy for awhile. And there's a lot more out there. You'll find some you like better as you go.
Oh I forgot about Anne McCaffrey's Dragon series books. I started reading those as a kid and was hooked. I started with "The White Dragon".