Okay, so I was on the soap box and didn't get to reply to the original post.
Steven Brust Jhereg
Neil Gaimen Neverwhere
Frank Herbert Dune
Ursula Le Guin Wizard of Earthsea
C. S. Lewis The Chronicles of Narnia
Karl Edward Wagner Bloodstone, Darkness Weaves, Night Winds, Dark Crusade, Death Angel's Shadow
Michael Morcock The Knight of Swords, The Queen of Swords, The King of Swords
I have no idea how C.A. Smith and Karl Edward Wagner got left out of Appendix N, but both would seem to be a clear oversight. The Earthsea Trilogy probably should be in there as well. As you noted, Moorcock is in there but his Corum books aren't specifically mentioned.
Both Neverwhere and Dune are (to me) classic works of fiction. I'm not sure they are "Appendix N" because they aren't really Swords & Sorcery, but they are impressive. Same with the Narnia books -- not at all the classic S&S feel but great books.
Steven Brust is amazing. I read his early books with a passion but after a while they are all starting to feel the same and I don't really keep up anymore. Jhereg could fit the Appendix N criteria.
Most of the other books on your list either I didn't like or haven't heard of before, which doesn't mean that they aren't good books but just that I wouldn't include them in a Hall of Fame book list.
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