The first character on our list could not be other than the most baddass pirate in the one-piece universe and the leader of the Red hair pirates, Shanks. Although Shanks has been a central figure of One piece from the very beginning, we know deceptively little about him. What we do know is that he is tremendously proficient with Haki, so much so that weak willed people faint in his very presence. Other than that, and the fact that the former Roger crewmate puts his nakama above all, Shanks is shrouded with mystery. We do not know where he comes from, how he became so powerful and most importantly how he ended up with Rogers hat.
The “Hero” of the marines. Dragon’s Father. Luffy’s grandpa. Roger’s biggest rival. These are the information that we have for arguably the best Marine that has ever lived. Garp is an eccentric but caring man, who is loyal to both his criminal family and the Marine Headquarters, who he has served for decades. He is loud, boisterous, exuberant, and overall acts in a similar manner to his grandson. The greatest mystery surrounding Garp has to do with his epithet "Hero of the Marines" during the time known as the "Era of Rocks" 40 years ago. This whole era is basically still an unknown, but what we do know is that Garp played a crucial role to ultimately defeat the “Rocks” Pirate Crew, which terrorized the world 40 years ago.
Before Roger there was another prominent force in the pirate world, and they were named the “Rocks” pirates. The Rocks pirates held such power that Garp stated that he could not imagine what the Marines would do if they came back into power. The most prominent members of the Rocks crew were Big Mom and Kaido. We still do not know how the Rocks pirates were ultimately defeated and the identity of their captain; a man so powerful that both Big Mom and Kaido were subordinates to
Gol D. Roger
Wealth, fame, power. The man who had acquired everything in the world, the Pirate King, Gold Roger. The final words that were said at his execution sent the people to the seas. The king of the pirates and the biggest influence on the pirate era. The man who did it all and had seen it all. Apparently, Gol D Roger heard the voice of all things (like Luffy) and had unparalleled conquerors Haki. His true power is one of the biggest question marks of one piece. It is unknown if he was a devil fruit user or if he fought purely with Haki, but what it is known is that he was crazily powerful. One piece’s greatest pirate to date has left us wanting for more and we hope that his past will be shown in detail.
ImThe latest addition to the one-piece universe is the true king, the person even the Gorosei bow down to, Im. Im's very existence is a secret to the rest of the world, however the fact that he sits on the empty throne, a seat whose occupant would be associated with sole authority of the entire world, and the fact that the Five Elders, who are publicly considered to be the highest authorities of the World Government bow before him and address him with a great honorific, would indicate that Im has the greatest known authority within the World Government. He appears to have all the knowledge of the lost century and the Will of the D. As important as he is , we know nothing else about him.