The Onion AV Club has a great article up featuring their list of the most influential comics artists of all time. It's a great introduction to guys you younger folk might not have heard of, but who nonetheless have influenced the comics and cartoons you love. Even old-timers like me can learn from it, too.
Plus, you gotta love a guy who can put together a paragraph like this:
He had legions of fans, even though he couldn’t actually draw; when he—along with Jim Lee, Todd McFarlane, and other controversial artists—helped form the creator-owned Image Comics in 1992, the world learned that he couldn’t write, either. Since then, it’s been revealed that he can’t do much of anything else. Still, there’s no denying that the guy owned the 1990s. It was a strange decade.
Three guesses who that's about, and the last two don't count. Anyway, check it out, it's a great article. And if you think someone was left off the list who ought to be included (Frank Miller, John Buscema, etc.) let 'er rip in the comments.