Scott MCloud is a cartoonist and theorist of comics as an artistic medium. You probably know him either as the author of Zot! or as the guy who made the book Understanding Comics (one of my favorite nonfiction books).
What's his type? I think he shows signs of Ti (he tries to "mold" several times in his book the definition of "comics", even going so far as to exclude single-panel comics like Family Circus from his neatly defined category); he also seems to have that N-ish view that "art is only constrained by its shape, and even that can be modified".
ENTP is my best guess, though INTJ or INFJ with strong Ti are not out of the question... Thoughts?