A reading project

Growing up, my reading skills developed extremely quickly and I generally ended up able to read at a very advanced level for my age. As a result, I largely skipped over YA literature. I missed a lot of great stuff, particularly in the fantasy genre. So I'm now going to work my way through the novels I didn't read, but probably should have. So far my list includes:
The Hero and the Crown and The Blue Sword by Robin McKinley
The Dark Is Rising series by Susan Cooper
The Earthsea books by Ursula K. LeGuin

Any other recommendations?
(For the purposes of this project, I'm only looking for books I could have read when I was between 10 and 15, so I'm not looking for anything published after 1989. Not that I'm not interested in recent great YA literature, I just have a specific goal in mind here.)