endman

A man at one end of a row or line.

One who takes the most advanced or extreme view of anything; an extremist.

A type of stock character common in American minstrel shows, occurring in pairs, flanking a character in the middle, and distinguished by exchanging jokes in between skits and songs.

I don't like the Minstrel folks, and I doesn't care for the endmen's jokes; I has no use for the musical mokes, and I don't like a circus clown […]