Finisher

Noun

1. A person who finishes or completes something.

   "The early finishers waited for the other runners to reach the finish line."

2. A person who applies a finish to something, such as furniture.
3. The person who applies the gilding and decoration in bookbinding.
4. A construction machine used to smooth a newly constructed road surface.
5. The blow that ends a fight; the knock-out blow.