Not alone at all! Add D.K. Broster, Jeffrey Farnol, Rosemary Sutcliffe, Evangeline Walton (who did the most accessible retelling of the 'Mabinogi' tales I've read), Madeleine L'Engle, John Buchan, Gene Stratton-Porter, and Kipling's lovely science-fiction stories, including 'With the Night Mail'. Lots of other Kipling. William Hope Hodgson. Algernon Blackwood. Clark Ashton Smith. Maurice Walsh (who wrote, among other good things, the story on which the movie 'The Quiet Man' is based). And yes, H. Beam Piper, Poul Anderson, also William Morris and George MacDonald and Michael Scott Rohan.
And let us not forget George Turner, Cordwainer Smith and John J. Alderson!
EDIT: If you like detective and puzzle stories, how could I forget Poe's detective stories, Ellis Peters' Brother Cadfael tales, and the satirical archaeological mysteries of Elizabeth Peters. Those are somewhat better for being read in sequence, so as to keep track of who are all the characters and how they relate to one another at particular points in the story, but 'The Last Camel Died at Noon' is a glorious send-up of a whole genre of adventure stories, as well as a ripping yarn in its own right.
