One Piece: Strongest Races Like Buccaneer

Revealed as the latest peak of strength, the Lunarian race has become the most powerful in One Piece. The fact that the World Government was willing to chase after the King of Beast Pirates proves its genuine potential. With the capability to withstand any abuse and an innate tendency of self-immolation, the Lunarians are worshiped as godlike creatures. As of present, Lunarians bring together the highest power in this story.

Fish-Men

Giants are one of the largest races known in history and only a few persons can fight with their strength. Although their body resembles us, humans, they possess a very colossal power. The Marines are aware of what they have and as such keep a specialized Giant division. Giants represent one of the pillars that ensure a dynamic power balance within some of the strongest races in this series.