6. NEAL ADAMS
Neal Adams is one of the few talents that would have to be considered for a Mount Rushmore of comic artists. The roster of characters that he redefined reads like a veritable who’s-who of the comics world. And near the top of that list is his work on the X-Men in the late '60s.
Adams didn't work on the book for all that long, but his contributions are a highlight of Marvel's art during the '60s. His highly detailed style, mixed with his refusal to stick to the normal panel layout, made Adams' X-Men work timeless despite the book’s cancellation soon after he started on it.