Roy Thomas

Roy William Thomas (born 22nd November 1940) is an American comics writer and editor who succeeded Stan Lee as Editor in Chief of Marvel Comics, and later worked for rival publshers DC Comics. He is notable for having introduced Conan to comics, and for his large body of work on "Golden Age" characters such as the Justice Society of America, but also worked on numerous other series' including Fantastic Four, X-Men, Avengers, Nick Fury, Spider-Man, Captain America, Thor, Batman and Wonder Woman.

From the point of view of British comics, though, he's basically here because he created the Black Knight, a minor member of the Avengers who later became a much more significant character at Marvel UK.