It's not higher calibre than game of thrones, but I actually really liked the Drizzt prequel books. Homeland, Exile and Sojourn. I wasn't so hot on the other books in the series. They are ok. I also really liked the Erevis Cale trilogy by Paul S. Kemp. Both trilogies are set in the forgotten realms, which is a Dungeons and Dragons thing.

I am actually a super big fan of LoTR, I have read them several times as well as the silmarilion and the hobbit.