The Dark Tower series by Stephen King is quite good. I'm working my way through it right now.
The Shannara series by Terry Brooks is good, but there are tons of books. (looking at the list I can't believe I've read most of 'em :P) The first trilogy, with a prequel, The Heritage Tetralogy, The Voyage of the Jerle Shannara trilogy, the High Druid trilogy, the genesis trilogy, and the legends duology . . . and he's still writing more!
His Landover series sounds good, but I haven't read 'em. I highly recommend his Word and Void trilogy too.