Othello
There was usually only one actor and then the chorus... However later on other playwrights introduced two actors and then three actors. But originally there was only one.
There was only one black actor on "I Love Lucy" and he appeared on the episode "The Great Train Robbery" as the train porter.
Tudor Petrut
Michael seater. He plays a role in Naturally Sadie as Cole though it's only for one episode. The guy who plays Marshall also plays in that episode.
Graham Jones
Samuel L Jackson is the African American actor currently in the Capital One commercials.,
Woody Strode plays Pompey, one of Tom Doniphon's (John Wayne) hired hands.
when an actor plays more than one character/role.
Jason Brooks
For ideas on how to make a movie with only one actor, check out the movie 'Swimming to Cambodia.' It is a mostly one-man movie starring Spalding Gray.
Only the actor and the producer know it. There is no fix rate of any one. This depends only on the reputation of a producer and his relation with the actor, who is working.
There are one of those in every mob movie.