One Piece - 3 Great Powers

The Yonkou literally Four Emperors, are the 4 great pirates who rule the second half of the Grand Line (known as ‘the New World’).
They are one of the 3 great powers, the other being the Shichibukai and Marines and live quite literally as though they are Emperors, doing mostly as they please. For the World [...]

The Shichibukai (Seven Armed Seas, Seven Warlords of the Sea)

are seven extremely powerful former pirates who have allied themselves with the World Government, hunting down pirates and other criminals. They hand over a fraction of their loot to the Government. In return for these actions, the World Government pardons these pirates for their crimes and [...]