Who Was The Dominant Writer of the Twentieth Century?

Who was the dominant writer of the twentieth century, if indeed such a question even makes any sense at all? In rejecting Alexander Solzhenitsyn's claim on the title, the Paper Cuts blog nominates George Orwell. As you might expect from the last time we played this game, I don't think anyone can really challenge Joyce, unless it's Kafka or (maybe) Gabriel García Márquez.