I also like Theodore Sturgeon and Cordwainer Smith for people-centered science fiction.
For fellow fans of le Guin, Sturgeon and Smith looking for more authors, I would recommend Lois McMaster Bujold. Space opera adventures on the surface, but with subtle depths and insights into human nature. Or for something more recent, Ada Palmer’s Terra Ignota series; we have solved world hunger, achieved gender equality and invented flying cars, but what are the implications for world politics and human interactions?