Conversation so far:
what influenced Ursula K. Le Guin?
She later said that science fiction did not have much impact on her until she read the works of Theodore Sturgeon and Cordwainer Smith
who were Theodore Sturgeon and Cordwainer Smith?
Theodore Sturgeon was an American fiction author, primarily of fantasy, science fiction and horror. Cordwainer Smith was the pen-name used by Paul Linebarger for his science fiction works.
how did Theodore Sturgeon and Cordwainer Smith influence Ursula K. Le Guin?
which other fantasy writer influenced Ursula K. Le Guin?
Authors Le Guin describes as influential include Victor Hugo, William Wordsworth, Charles Dickens, Boris Pasternak, and Philip K. Dick.
how did Philip K. Dick influence Ursula K. Le Guin?
Le Guin later described her novel The Lathe of Heaven as an homage to him.
did Ursula K. Le Guin have other influences other than fantasy writers?
She preferred reading Virginia Woolf and Jorge Luis Borges to well-known science-fiction authors such as Robert Heinlein.

Question: what was her biggest influence?
Self-contained rewrite: what was Ursula K. Le Guin's biggest influence?