#5 – KAIDO
Kaido possesses immense mastery in Haoshoku Haki, which was first displayed when he clashed against fellow Haoshoku Haki user Big Mom, resulting in a lightning-like effect that shook Onigashima and split the heavens. Most notably, Kaido is one of a select few powerful individuals able to imbue their Haoshoku Haki into objects such as his kanabo, which is signified by thin lightning-like streams of dark energy emanating from the imbued areas. This imbuement allows him to dramatically increase his attack power as a supplement to his natural physical strength and Busoshoku Haki; this degree of strength has allowed him to quickly knock powerful pirates like Luffy, Zoro, and Law unconscious with only one or two strikes.
Kaido is an immensely powerful user of Busoshoku Haki, which he is capable of imbuing into his kanabo. In the battle on Onigashima, similarly to Katakuri, his Busoshoku Haki was strong enough to damage Luffy who hardened both of his arms. He is capable of utilizing the advanced application of projecting his Busoshoku Haki out from his kanabo, allowing him to strike opponents many meters in front of him with devastating power without the need to make direct contact, and the attack power can be further increased if the kanabo is imbued with Haoshoku Haki.
Kaido possesses Kenbunshoku Haki, which he first demonstrated when he sensed the “voices” of the supernovas in the wake of his and Big Mom’s combined attack which enabled him to tell they were still alive. In the rare event that he faces an attack that will harm him, Kaido can also use this Haki to help him dodge.
#4 – SILVERS RAYLEIGH
Rayleigh is shown to possess great mastery of Haki, and made use of all three types while teaching Luffy about them, and training him in the basics.
Rayleigh has mastered Haoshoku Haki to the extent that he can render a specific target completely unconscious. He is able to do this without adversely affecting anybody else near the initial target. He disabled an entire hall room of hostiles with this power, save for the Kid Pirates and Heart Pirates.
Rayleigh has an extremely high level of skill in Busoshoku Haki, allowing him to effectively bypass the powers of a Devil Fruit user and touching the “substantial body” beneath whatever protection the fruit provides as seen when he used Busoshoku Haki to kick and redirect an attack from Admiral Kizaru. Rayleigh can utilize an advanced application of Busoshoku which enables him to emit his Haki a short distance without a medium. He is also able to use a high-grade version of this technique, where Rayleigh can channel his Haki into his opponent, letting him destroy them from the inside out, which he first used to destroy Camie’s collar.
Rayleigh is highly proficient in Kenbunshoku Haki, able to sense the emotions and nature of others. He could also use it to sense the strength of others on a wide scale. The incredible mastery Rayleigh has over this kind of Haki is also shown by the fact that he can sense people all over the island he is currently on while most people can sense only in their immediate vicinity.
#3 – GOL D. ROGER
Roger possessed immense mastery of Haoshoku Haki, which was seen when he clashed with fellow Haoshoku Haki user Edward Newgate.
Roger was one of the few people able to “infuse” his attacks with Haoshoku Haki to exponentially increase his attack power and make his Haoshoku Haki emit from a short distance from his saber, with his sword being shown emitting streams of lightning-like energy to signify this infusion.
Roger possessed immense mastery over Busoshoku Haki. As a testament to his mastery, he overpowered Kozuki Oden, who was an exceptional master of Busoshoku Haki in his own right, with only a single brief attack. Furthermore, Roger with his Busoshoku Haki was able to battle against Whitebeard, who was already known as the “Strongest Man in the World” at that time by three days and nights.
Roger also possessed the ability to use Kenbunshoku Haki.
#2 – SHANKS
Shanks has mastered to full extent all three types of Haki. Even Whitebeard complimented Shanks for his Haki when he used it on his visit.
Shanks showed great mastery over Haoshoku Haki on board the Whitebeard’s ship. A large number of Whitebeard’s crew (experienced men who have survived in the New World) lapsed into unconsciousness and the ship itself began to take physical damage from Shanks’ mere presence. Whitebeard’s men attributed this to his superior Haki.
Shanks has great mastery over Busoshoku Haki, as shown during the Battle of Marineford, with his Haki infused sword he easily block Akainu’s magma enhanced punch that is powerful enough to burn the strongest enemies such as Ace, Jinbe, and even the Yonko Whitebeard.
Shanks also has full mastery over Kenbunshoku Haki, though he was never seen using it.
#1 – WHITEBEARD
Whitebeard was known as “The Strongest Man in the World” and “The Man closest to One Piece” after Gol D. Roger’s death.
His incredible mastery over Haoshoku Haki was displayed against his longtime rival, Gol D. Roger. Their joined Haoshoku Haki clash cracked the air, creating creating an effect akin to lightning and generating a shock wave that blew back everything and everyone on and near the island.
Most notably, Whitebeard was one of a select few people powerful enough to “infuse” his weapon in Haoshoku Haki, which exponentially increased his attack power further. He was shown using Haoshoku infusement during his clash with Roger, with it being signified by a stream of dark energy rising up from Murakumogiri’s blade.
Whitebeard possessed a tremendous mastery of Busoshoku Haki, which he could imbue his weapon Murakumogiri with. Whitebeard could also utilize the advanced technique of projecting Haki out from his blade; this was shown during his fight with Roger where the duo’s weapons met in a powerful clash without even making contact.
Whitebeard was also masterful in using Kenbunshoku Haki. It was first shown 30 years prior after both he and the Whitebeard Pirates, as he could sense “something incredible” coming from a vast distance towards them. In the bay of Marineford, he predicted Crocodile’s sudden attack but did not move, knowing that Luffy would block it. However, due to both his age and worsening health, he failed to predict Squard’s betrayal and thus got injured, something which, according to Marco, was totally unexpected from the Yonko.