Felix Yoon is a visual development artist and illustrator who has worked at Dreamworks Animation.
On his website you can find examples of his concept art, color keys and characters, as well as personal work.
There is an additional gallery on Concept Art World.
When Yoon was a student at the Art Center College of Design, he was a contributor to The Skillful Huntsman book project (see my post on The Skillful Huntsman).