In no particular order, a list of some of my favorite authors-
Michael Moorcock- A small caveat about Mr. Moorcock. I have only read one short story written by the man. This should tell you how I feel about his writing. Moorcock is a unique wirter in that his writing is literally about Joseph Cambell's Hero of 1'000 Faces. All of Moorcock's heroes are diferent incarnations of the same character who exists across diferent realities. Its like a really twisted version of Doctor Who.
Stephen King: Not only did he right the first adult horror novel I ever read, he also created his own multiverse out of pop-culture ephemera. His Dark Tower epic totaled eight books and was based on not only on a medeival poem but also a Deep Purple song. Now that is impressive.
Peter David: Quite simply one of the funniest writers in comic today. A Peter David story might not have a lot of flash to it but it is sure fun to read. A good Peter David comic is a solid work of super-hero fiction in a world which sadly underates such things.
Harlan Ellison: Ellison is a contreversial figure in science-fiction. Certainly, much of his early work come off with a mysogynist vibe. That doesn't matter so much because is an incredibly talented writer with one of the most extensive vocbularies in science-fiction.