Quillstine
Troubadour
I would be remiss not to mention Frank Herbert's Dune one of the best examples of fantasy and SF blended together, old magic and technology working together. It has the Bene Gesserit witches, space guilds, sand worms, the Weirding Way, a "Chosen One" (probably the best one I've ever seen.)
I agree entirely...Dune remains one of my favourite books....but once again I thought every one would have read it already!