This appears to be a pretty exhaustive list of science fiction/fantasy writers and their religious affiliations.
Note that Stephen King, whose novels and short stories are rife with Christian fundamentalist whack jobs (think Carrie , The Mist , and Misery real fast), is listed as a Methodist. And it’s not every day that you see Pat Robertson and Jules Verne so closely allied. (Gotta love Aldous Huxley under “Hindu.” And how “Objectivist” is now a religion. I’m certain Ms. Rand would have loved that . . . )
Also noteworthy is the lengthy catalogue of LDS writers. Just an observation. I’m not drawing any conclusions.