I've read most of those and agree with your thoughts on Lord of The Rings. Further, IMHO none of the witchcraft-themed novels should have made the list as they're in a genre unto themselves.

Conspicuously absent is Greg Bear's "Eternity", as are any of "The Stainless Steel Rat" series by Harry Harrison - simply fun material to read. John Varley ("Titan, Wizard, Demon" trilogy) should definitely have made the top 25. Very dark, gritty stuff...and he illustrates it very well.