Discussion - Akainu's Ability

Busoshoku Haki granted the user the ability to touch Devil Fruit user's true body but it doesn't cancel out the Devil fruit's effect. So having Busoshoku Haki doesn't meant automatically ownage against Logia users and or having the upper hand against Logia users still because of their Devil

One Piece 1064 makes fans debate if Shiryu is stronger than Aokiji

Anime Discussions and Memes - Anime Discussions and Memes

Character Discussion - Akainu's Portrayal Revisited

Powers & Abilities - Admirals advanced haki

Akainu, Four World Series Wiki

Akainu, TheMultiOmegaverseMegaPrime Wiki

Discussion - Akainu confirmed to have strongest attack of all DF users!

One Piece fans divided over Akainu's potential to rival Kaido

Considering Luffy's achievements, will he be able to defeat Akainu now? So what do you think the reward would be for defeating the Fleet Admiral? : r/OnePiecePowerScaling

Powers & Abilities - Whitebeard taught AdCoC to Akainu..

Kaido - News - IMDb

Onigashima - News - IMDb

Akainu is him. : r/OnePiece

One Piece creator once spoke about the character who could end it all, literally

Sakazuki, One Piece Wiki