@Hereje015 I just wanted to share this curiosity.
@FusionSpell There are some signs in the story that make me think Ryuma is the strongest in the verse (Nothing confirmed yet).
I consider the leaders of the lost century stronger than the leaders of Gol D Roger's era and the current era (the current one will only be the strongest at the end, I believe). At that time there were global wars in which 20 large kingdoms had to come together to fight another kingdom. The 3 feared ancestral weapons were active and 6 moons disappeared from the planet's orbit according to Ohara researchers.
Joy Boy, Imu, Ryuma... I believe they will be the strongest.
Imu beat Joy Boy, that's a fact and Joy Boy had Poseidon and Pluton at his disposal (maybe he didn't use them), and Im won using some crazy strategy, but that doesn't take away his merit of winning the Old Kingdom and building a kingdom that has been at its peak for more than 800 years.
As for Ryuma, well... The Government moved its army against the Old Kingdom and won, the Government moved its army against the Lunarians and won, the Government moved its army against the country of Gold (Gyukimaru said there were countless lines of enemies, so I assume it was an army), they were kicked out of the country and Ryuma told the world that there were Samurai in Wano. Furthermore, they chose Wano as the place to store Pluton precisely because it is one of the safest places on the planet. Poseidon could differently be killed and reincarnated again, but Pluton needed to be hidden. I'm not going to mention Uranus because I have no idea what it could be.