Blackbeard's the worst of them, no doubt. He razed Drum Kingdom, almost completely destroyed Banaro Island, and pretended to help the marines all so he could gain access to the pirate prison and break out the worst criminals in the world.
Nico Robin has the power to destroy the world, Straw-Hat's going to become the Pirate King which is likely to break the world if Blackbeard doesn't do so before him. Their whole crew was involved in the destruction of Enies Lobby, attacking a tenryuubito, and Straw-Hat himself broke into Impel Down as well and helped unleash the other criminals he felt like, including one he helped put away in the first place.
[Action]
Blackbeard's the worst of them, no doubt. He razed Drum Kingdom, almost completely destroyed Banaro Island, and pretended to help the marines all so he could gain access to the pirate prison and break out the worst criminals in the world.
Nico Robin has the power to destroy the world, Straw-Hat's going to become the Pirate King which is likely to break the world if Blackbeard doesn't do so before him. Their whole crew was involved in the destruction of Enies Lobby, attacking a tenryuubito, and Straw-Hat himself broke into Impel Down as well and helped unleash the other criminals he felt like, including one he helped put away in the first place.
It's an extremely long list Kohaku.