Tolkien, Tolkien, Tolkien, and Tolkien! I count four different fields of writing, although some of them are related.

1. Tolkien, for Lord of the Rings and to a lesser extent, The Hobbit.
2. Tolkien, for The Silmarillion and (with posthumous editing by his son) The Book of Lost Tales, Unfinished Tales and another whose name I don't recall at the moment.
3. Tolkien, for his fairy stories (not all for children, by any means).
4. Tolkien, for his translations of Middle English poetry, such as Pearl, Sir Lancelot and the Green Knight and more.

Dave Oesterreich