Wells, Huxley, Orwells

K.Dick, Alice Sheldon/James Tiptree Jr. , Roger Zelazny

Ursula K. LeGuin, Asimov, Heinlein, Micheal Moorcock

Edit : and Asimov and Heinlein are used as examples of right leaning sci-fi

Here’s all the name in the article

I think Kim Stanley Robinson and Charles Stross are rather left wing too.

I mean Le Guin is head and shoulders more "left", although I think that's an oversimplified view to the point it breaks down a bit