Peter de Sève is an accomplished illustrator and visual development artist, mostly known for his amazing New Yorker covers, and his delightful character designs for the Ice Age films.
He's the guy who designed Scrat.
Yeah. That guy. He's awesome.
The greatest thing about his illustrations is the incredibly amount of character and design he infuses into them. I talk a lot about story, because I think it's the most important thing an artist can consider when designing for a film... or anything really. And it would seem that's all Peter does is focus on story, because his paintings are so rich with it, it's just insane.