Pen name for French graphic artist Jean Giraud. Did lots of work for the French magazine Metal Hurlant, much of which found its way into its American counterpart, Heavy Metal. His most famous piece is The Incal Light (starring John DiFool). There's an arcade in San Francisco's Metreon designed around his artwork called The Airtight Garage (another one of his stories). He also designed the sets for the very silly Luc Besson film "The Fifth Element." Big fan of American westerns, as evidenced by many of his storylines. Did a really killer album cover for Jimi Hendrix's Voodoo Soup.

http://www.moebius-us.com/arcana.html
has lots more info.