Melkor's depiction by artists: Flawed?

[Inziladun]

Originally Posted by Zigûr

One of the best things about it in my opinion is that it leaves Morgoth's face to our imagination.

As it should be. To me a visualization of the face of Morgoth (and for that matter, Sauron) is entirely counterproductive. Fear of the unknown is much more effective generally than a hard point of reference. When you're talking about the ultimate Tolkien personification of Evil, what outside the mind of the reader could possibly do it justice?