Hercule Satan

If I got this guy to change his ways, then I truly have saved the world. During the Dragon Ball Z time period, Mr. Satan is the reigning World Martial Arts Champion, a title won fairly by beating other normal earthlings in a time when Goku and other powerful fighters were battling on Namek and later against the Androids. During the time of the Cell Games, Mr. Satan was already rich and famous, but also an egomaniac. He boasted endlessly on television about his strength, and that he was the “best fighter in the world.” In the eyes of characters who know otherwise, he is considered to be a showboating blowhard.

Strength

• Breaks fourteen roof tiles with one chop (source) (Cell Saga)
• Gets 137 points in a punching strength test (source) (Buu Saga)
• Beats up two armed men (source) (Buu Saga)

Speed

• His punches leave after images (source) (Buu Saga)
• Dodges a rocket after it was fired and then quickly moves towards the shooters and takes them out before they could react (source) (Buu Saga)
• Punches so fast his fists are a blur (source) (Buu Saga)

Durability

• Gets tossed into a mountain by Perfect Cell (source) (Cell Saga)
• Gets punched by kid Trunks (although he was told to do it lightly) (source) (Buu Saga)
• Survives getting shot long enough to be healed by Buu (source) (Buu Saga)

Other

• He saved the world (source) (Buu Saga)