Here is an illustration from "The Revenge of Skeletor!", a minicomic from The New Adventures of He-Man toyline! Now, we all know that Bruce Timm would go on to become one of the most accomplished individuals in the field of animation! What I find interesting is that in this panel you can clearly see his style forming as an artist. One can see numerous elements of character design, not least of all with the way in which Timm has illustrated the jaw line, which would show up in Batman: The Animated Series.
(click on the image to see it at full-size)