For a list of the comics he has Colored see:
Comics Colored by Clayton.
For a list of the comics he has Inked see:
Comics Inked by Clayton.
For a list of the comics he has Penciled see:
Comics Pencilled by Clayton.
Clayton Crain works for Marvel and has contributed to various Comics from Ghost Rider to Wolverine and Silver Surfer. He still works for Marvel to this day.