If the point boils down to just killing, Kaido is leading the Ranking so far, Killed Oden, killed the 3 samurai from the Flash back of Yamato, implemented a dictatorship in the country of Wano in which thousands of people died of hunger and slavery (forced labor), killed Luffy momentarily, the author repudiates the narrative that for a story to be good there needs to be several deaths, but wano ended up having more deaths than Marineford...
How can the fact be justified that:
Kizaru, Akainu, Whitebeard, Aokiji, Garp, Sengoku, all the military might of the navy, all the shichibukai including
Mihawk,
all the pacifists, all the Whitebeard pirates (all the military power of the Whitebeard), Blackbeard and all level 6 prisoners including Shyriu, and in this whole war there were only 2 deaths like Wano... Please try to justify.
Try to justify there champion because Marineford ended up having "fewer" deaths than Wano even having all these guys there, remember that it was said on SBS that when Whitebeard removed his medical devices he was literally throwing his life away, so it was necessary that he commit suicide so that Marineford adds 2 deaths. LFMAOOOOOOOOOO
"But but but but Kaidou didn't kill anyone "...
Maybe if Kaidou was crushing the scabbard's skulls unconscious on the floor instead of making small talk with Big Mom while drinking 5 liters of alcohol things would change but unfortunately he doesn't have the power to rewrite history.