1. Dempsey
2. Shavers
3. Liston
4. Johnson
5. Foreman
6. Frazier
7. Louis
8. Tyson
9. Marciano
10. Lyle

An honorable mention to Ali (who would be #11). People forget too much that yes, while he did wear his opponents down, it was not until he saw the openings that he grit his teeth and threw the bombs. It wasn't his game until the end, but the results can not be argued when he let loose. If there was an active poll for greatest finisher, he would be #1.