7 – AKAINU / AOKIJI / KIZARU
Akainu, Kizaru and Kuzan have all great mastery over Busoshoku Haki, as shown during the Battle of Marineford, when they used an advanced level of Busoshoku Haki to negate Whitebeard’s attempt to destroy the execution platform, by creating a shield combination of their three Haki.
6 – KOZUKI ODEN
Oden was an exceptionally skilled master of Busoshoku Haki. This is most noted as he was the only samurai who could tame the Meito, Enma despite its dangerous haki-draining properties, which even Kin’emon feared to accept. As a true and further testament to his skills, he was able to wound even the nigh-invincible Kaido whereas even Luffy using Boundman could not even damage him, displaying his supreme mastery of this Haki compared to Zoro who had his arm emaciated after his initial attempt at using Enma although he forced his Haki back into his arm.
Even at the age of eighteen, he was already masterful in using “Ryuo”, as he could imbue it into both his swords (Ame no Habakiri and Enma) hardening them and cleanly bisect the gigantic Mountain God of Wano in a single slash. At the age of twenty-nine, Oden could harden his swords and clashed against Busoshoku Haki enhanced Murakumogiri, one of the 12 Saijo O Wazamono belonging to Edward Newgate, who was an immensely powerful Busoushoku Haki master in his own right.
5 – SHANKS
Shanks has great mastery over Busoshoku Haki, as shown during the Battle of Marineford, with his Haki infused sword he easily blocked Akainu’s magma enhanced punch that is powerful enough to burn the strongest enemies such as Ace, Jinbe, and even the Yonko Whitebeard.
4 – BIG MOM
Big Mom has immense mastery of Busoshoku Haki. By hardening her arm, she could easily block Luffy’s Gear Fourth Kong Gun, a tremendous feat as Luffy’s Kong Gun is powerful enough to break through powerful Haki based defenses of highly skilled Busoshoku Haki users such as Doflamingo, Cracker and Katakuri.