The American artist Nate Hallinan has created an original set of illustrations. He reimagined the X-Men in an alternative medieval-fantasy universe. The final result is really amazing. You can see more works of this concept artist, matte painter and illustrator, just take a look at his portfolio.
Mat Miller is an English illustrator based in Bristol and currently working freelance. This young artist has a very interesting style which mixes traditional and digital techniques.
Mlle Hipolyte is a French artist specialized in illustration and paper design. She notably created a very colorful and detailed set of animals with tiny pieces of paper.
Raph Lomotan is a young illustrator based in Manila, Philippines. He works in freelance on different projects and draws mainly characters and creatures from imaginary universes.