Here are some Concept artists.
Park Jong Won.
He is based in Seoul, South Korea, where he works in the video game industry. He has created concept art for games like 'Aion', 'Steel Dog' and '4Story Online'.
You can see the designs made in the last one. There is a large process of work to do when doing concept because everything has to be thought of.
I particularly like Stephanie Olesh's work. She makes concept art for video games and animation- both creatures and characters.
I am particularly fond of concept art. I f I were to pursue a career in art I would do concept art. There are many places where you can study concept art - visit www.conceptartworld.com for more information on concept art and on being a concept artist.