I found Moorcock to be very variable....Elric, Von Bek, Count Brass were excellent but his other stuff was a bit, well, 60's if you know what i mean!
Ender's Game was great, the rest of the series poor.
David Eddings i loved at the time but a bit like Feists stuff it's all a bit 'fluffy' and generic these days :)
Robert Jordan's series WOT was excellent until about book 4/5 then just gets tedious...
Robin Hobb is also very good.