scripter — the letters or characters used in writing by hand; handwriting, especially cursive writing.
correspondent — A correspondent is a newspaper or television journalist, especially one who specializes in a particular type of news.
critic — A critic is a person who writes about and expresses opinions about things such as books, films, music, or art.
dramatist — a writer of dramas or dramatic poetry; playwright.
editor — a person having managerial and sometimes policy-making responsibility related to the writing, compilation, and revision of content for a publishing firm or for a newspaper, magazine, or other publication: She was offered a managing editor position at a small press.
screenwriter — a person who writes screenplays, especially as an occupation or profession.
contributor — You can use contributor to refer to one of the causes of an event or situation, especially if that event or situation is an unpleasant one.
essayist — A person who writes essays, especially as a literary genre.
ghost — the soul of a dead person, a disembodied spirit imagined, usually as a vague, shadowy or evanescent form, as wandering among or haunting living persons.
originator — to take its origin or rise; begin; start; arise: The practice originated during the Middle Ages.