Ursula K. Le Guin? Haven't read. Is her work closer in style and significance to Joyce, Shakespeare, Gaiman or MoR? If one of the last two I'd add her to my to read list.
I thought that A Wizard of Earthsea was a good counterpoint to a lot of the other fantasy books that I read as a child; I think that MoR!Harry would have made a few less mistakes if he had read and grokked it.
"The kind of classic fifties-era first-contact story that Jonathan Swift might have written, if Jonathan Swift had had a background in game theory."
-- (Hugo nominee) Peter Watts, "In Praise of Baby-Eating"
Three Worlds Collide is a story I wrote to illustrate some points on naturalistic metaethics and diverse other issues of rational conduct. It grew, as such things do, into a small novella. On publication, it proved widely popular and widely criticized. Be warned that the story, as it wrote itself, ended up containing some profanity and PG-13 content.
PDF version here.