Marvel Chief Editor, Died 2018
Puzzle 9 of Classic Things Medium Pack
Question is: Marvel Chief Editor, Died 2018
and the answer is: STANLEE
Word Meaning:
STAN — (Internet slang, sometimes derogatory) An extremely obsessive fan of a person, group, character, or creative work, particularly one whose fixation is unhealthy or intrusive.
Definitions from Wiktionary.