A few authors not mentioned earlier:
Guy Gavriel Kay - the early novels (Fionavar, Arbonne) tend to have defined good and evil, while the later ones (Tigana, Al-Rassan, Sarantium) tend to more complex characterisation. You'll want to read Fionavar before Ysabel, but otherwise they are all separate.
Richard Morgan - Dark and gritty. On other threads he's been compared with Joe Abercrombie, but I haven't (yet) read the latter.
Jacqueline Carey - Kushiel series. I think the first trilogy is the best. If you've ever seen
this list she takes #5 and 6 and runs with it in a completely believable way. Not for the prudish.
Stephen Donaldson's Mordant's Need duology - I liked this (and the short story/novella Daughter of Regals) better than Thomas Covenant, and the first Gap novel just made me feel sick.