OK - I have LOADS :)
Anne Bishop
Peter S Beagle (Wrote The Last Unicorn, always makes me cry)
Octavia Butler - bit more thought provoking, not so much fantasy
Jacquline Carey
Diana Duane - And Here for a link to a book she has written for free
Diana Wynne Jones - more young adults, but very readable
Geroge RR Martin - Song of Ice and Fire series, Game of Thrones is currently on Sky, although I've not seen it yet. More political fantasy
Naomi Novik - Dragons and Napoleon
Maria Snyder - not amazing, but an easy read
Sherri S Tepper - slightly feminist sci-fi fantasy
Jane Yolen
Robin Hobb/Megan Lindholm v good, as are the others mentioned above.
For free short stories www.freesfonline.de is pretty good - not all sci-fi, a really mixture.
www.tor.com is a great blog if you need any more inspiration.
I have too many books :)