What can I read that will hit as hard as A Song of Ice and Fire?

I've read the first five books of A Song of Ice and Fire and I absolutely love them. The world building is incredible, the characters are all unique and interesting, plus most of them develop really well throughout the books. I can't say there are any story arcs in the books that I'm not invested in. Having said that, it's looking more and more likely that George R.R. Martin will not finish The Winds of Winter, let alone write A Dream of Spring…. Are there any other books or series that might scratch this itch for me? I'm open to other genres as well if necessary.