A screenwriter
lots of people do, during lots of different times. for instance, the star spangled banner was written during a war.
a fan
hitorians
Bart writes, "i will not illegally download this movie"
A person who watches movies might be referred to as a viewer. Also I have heard people call them a movie buff, which means they know a lot of stuff about movies.
The person who makes a will (or 'testament') is a testator.
A Philosopher
A person who writes the libretto for an opera is simply referred to as the librettist.
A drawer.
proposal
publisher
A poetry
A person who writes verses is a poet.
A columnist...?
The word is referee.
Procedural Author
Columnist