I don't read much Fantasy/Sci Fi these days. The F/SF section in bookstores has become over-cluttered with endless reiterations of stale themes, ever more sexed-up to try to stay "cutting edge." These days, I think historical novels are where the really best authors are working, leaving only the second-rate and the wanna-bes to fill out the F/SF shelves.
Anne McCaffrey's work was fresh and exciting to this kid growing up in the 1960s and 1970s. She has many imitators, but few peers, among F/SF writers today.