I've read Tad Williams, all GGK's books, and ASoIaF. All great Fantasy books/series. I personally put Fionavar above the rest, but I really did love them all. I might have found GRRM's stuff a bit depressing in that almost every character you care about seems to die, but it doesn't really deter me,
.
Good luck, enjoy. I wish I could go back and have all these amazing books waiting unread, lol.
Lena.