Joe Louis
Nicknamed the “Brown Bomber,” Louis helped elevate boxing from a decline in popularity in the post-Jack Dempsey era by establishing a reputation as an honest, hardworking fighter at a time when the sport was dominated by gambling interests.
Louis’ reign as champion, which lasted 11 years, 8 months and 8 days, is the longest in Heavyweight history.
He also holds the Heavyweight record for most consecutive title defenses with 25. For an interesting take on the social important of Louis’ reign, check out “Champion of the World” by Maya Angelou.