What are your favorites?
A couple off the top of my head:
Tolkien and Frank Herbert (of course)
Matthew Woodring Stover -- Heroes Die and Blade of Tyshall are excellent, but I haven't read Cain Black Knife yet
The Women of the Otherworld series by Kelly Armstrong is excellent if you like occult fiction (which I do)
Patricia Briggs -- I've only read her Mercy Thompson series so far, and it's very entertaining
Anne Bishop -- Kushiel's Dart and Sebastian are what I've read so far
Douglas Adams, of course
I can't remember the name of the author, but the Wayfarer's Redemption series is pretty good, if a little complicated
Jane Yolen wrote a wonderful YA series called the Pit Dragon Trilogy that I wore out when I was young.
Umm... That's what's popping into my head at the moment. What about you guys?