I recently discovered books by Raymond E Feist, I am on the final book of the Riftwar Saga which I have really enjoyed. Makes a nice change after ploughing through the Game of Thrones saga which really was well past it's prime by about book 3.
You have a pleasant surprise coming then as the series following the Riftwar one, the serpent war saga is probably his best work. He sold out after that and went to far shorter books at the same price with lower quality. The Empire series he co-wrote with Janny Wurts are also excellent.
I first found Feist when he released his first book when I was 14. I've re-read Magician many times over the years.
The George RR Martin books started well but it was clear that he'd lost his plot notes by the 3rd. Also, one book every 5-7 years isn't that promising from an old, fat writer with health problems.
If you like challenging reads in that genre then Steven Erikson's Malazan Book of the Fallen series are well worth a read. As is the Wheel of Time series done by Robert Jordan and finished by Brandon Sanderson after his death.
The Thomas Covenant chronicles by Stephen R Donaldson are darker reads with the name character being a morally bankrupt leper.