Belgian André Franquin is most known for his comic creation "Gaston Lagaffe", a weekly episode of a guy with lots of interesting ideas but poor execution. Although Franquin had a very humorous style and lots of great ideas, he could be very depressed and couldn't draw for years. Perhaps that's the price some people have to pay for their talent.
Despite that his style is very vivid and extremely fluent. When you're reading his comics it almost looks as if you're watching an animated movie. I can't name any other illustrator who comes close to that style. Take a look at this website and you'll see what I mean. It's French, but the drawings will do the talking.