One Piece: From the Start, I Have the Human-Human Fruit, Model: Erlang Shen

No System, just a strong One Piece vibe and a tragic hero who saves people. Buggy's strictest second-in-command, Mihawk's most troublesome lifelong rival, Shanks's least welcome elder, Kaido's most desired man, and a manlier man than Teach could ever hope to be. A friend to women, the Marines' most trusted friend, and a mentor to the Revolutionary Army. The first master of the three Luffy brothers, a benefactor to Kuma and Ginny, and the captain most admired by Law and Rosinante. Robin's most trusted boss, the heartless bastard Nami says she wants to pull the plug on, and the dream man Hancock and her sisters can't forget. A specially recruited candidate for the Celestial Dragons, and the subordinate Imu values most. After transmigrating into the world of One Piece as a slave to the Celestial Dragons, Dudi somehow becomes the universally recognized King of the World years later.