Tolkien drew a picture of Sauron (below) that does back up Peter Jackson's choice of character design, but the Sauron costume is even closer to John Howe's drawing of Morgoth for an edition of ...

Illustrator John Howe is known for his beautiful depictions of Tolkien's works, having served as an artist on Peter Jackson's Lord of the Rings films, as well as illustrating maps for various ...