Chris Claremont

Christopher S. "Chris" Claremont is a British-born American comic book writer and novelist, known for his 16-year stint on Uncanny X-Men, far longer than any other writer, during which he is credited with developing strong female characters, and with introducing complex literary themes into superhero narratives, turning the once underachieving comic into one of Marvel’s most popular series.
During his tenure at Marvel, Claremont co-created numerous important X-Men characters, such as Rogue, Psylocke, Shadowcat, Phoenix, Mystique, Lady Mastermind, Emma Frost, Siryn, Jubilee, Rachel Summers, Madelyne Pryor, Sabretooth, Strong Guy, Mister Sinister, Captain Britain and Gambit. Claremont scripted many classic stories, including "The Dark Phoenix Saga" and "Days of Future Past", on which he collaborated with John Byrne. He developed the character of Wolverine into a fan favorite. X-Men #1, the 1991 spinoff series premiere that Claremont co-wrote with Jim Lee, remains the best-selling comic book of all time, according to Guinness World Records.