Who hold the world record for boxing?

I'm sure there are a few of them:

Archie Moore for scoring the most ko's of any champion.

Thomas Hearns for being the first boxer to win titles in 5 weight classes.

Oscar De La Hoya for being the first to win 6.

Manny Pacquiao for being the first to 7.

Henry Armstrong for being the first to hold titles in 3 weight classes simultaneously.