The strongest technique facilitated by the Blood Demon Art is Gyutaro's Rotating Circular Slashes: Flying Blood Sickles.
Hantengu's Blood Demon Art is one of the most, if not the most versatile Blood Demon Art on this list. This ability allows his emotions to manifest in physical form, each having a unique set of abilities and appearances.
Muzan's Blood Demon Art is, of course, befitting his status as the predecessor of all demons. Besides human transformation into monsters, he can also use his blood to either enhance the strengths of demons under his command or destroy them.
Curse of Kibutsuji
This curse besotted any who partake of Muzan's blood must be careful. The curse prevents Muzan's name from being spoken aloud, and any who do will meet a horrible demise. One demon, Susamaru, faced this reality when battling Tamayo.
Pyrokinesis: Nezuko's Blood Demon Art allows her to generate and manipulate special demonic flames created from her blood that are pinkish in color. Nezuko can do this by igniting her blood or creating it from thin air.
Destructive Death ( 破 は 壊 かい 殺 さつ , Hakai Satsu?): Akaza's Blood Demon Art is centered around martial arts, combining the manipulation of destructive shockwaves and the Soryu Style ( 素 そ 流 りゅう 式 しき , Soryū Shiki?) martial arts he mastered when he was a human.
Sleep Inducement: Enmu's Blood Demon Art granted him the ability to force anyone into deep sleep. He can do this through different means, some more subtle than others, but all effectively leaving his foes vulnerable and unable to fight.
But if we are talking about the human form, then it's a big fat NO, because Tanjiro has just mastered the Sun Breathing whereas Yoriichi is the inventor of it, also he's way more powerful and holds an unfathomable battle intellect, larger than any Demon Slayer in history, so in conclusion, no one is remotely close to ...
1) Kokushibo
Being the older twin brother of the legendary Demon Slayer Yoriichi Tsugikuni, Kokushibo had considerable strength as a human. This impressed Muzan enough to give Kokushibo his own blood and turn him into a demon and the first member of the Upper Moon Demons.
The Lower Rank 5 Demon Rui was a huge pain for Tanjiro to fight against. This demon's threads were extremely powerful and had all but killed both Tanjiro and Nezuko in battle. However, Rui was no match against the might of a real Hashira.
Moreover, she has a strong resistance to blood and can survive without devouring any human life. She is the only demon who has shown greater potential without consuming a single drop of blood, and her Blood Demon Art could even overpower the Upper Ranks of the 12 Demon Moons.
Over a century ago, Doma held the position of Upper Rank Six ( 上 じょう 弦 げん の 陸 ろく , Jōgen no Roku?), and during that tenure, he turned Gyutaro and Daki into demons and introduced them into the Twelve Kizuki.
A millennium ago, during the Heian Era, Muzan was turned into a demon during an experimental treatment trying to cure his terminal illness, and his goal since then was to live without the fear of death and become truly eternal.
2/10 Biokinesis – Muzan
The main feature of his Blood Demon Art is cell and body manipulation, allowing him to shapeshift and alter his body in various ways.
While Mist Breathing has six forms, he created a Seventh Form: Obscuring Clouds during the fight with an Upper Rank Demon. Muichiro can defeat Akaza easily with his petite body that leverages his speed. Moreover, his ability of Transparent World can aid him in landing a fatal blow on Akaza's weak spot.
Despite losing his memories, Akaza was noted to have subconsciously retained his strong feelings for Koyuki, this is seen where Doma noted that Akaza absolutely refused to kill and eat women during his hundreds of years as a Demon, despite his obsessive desire for more strength and power.
She was ranked in 3rd place in the first Demon Slayer character popularity poll with 3,319 votes. IGN regarded Nezuko as one of the series's most popular characters and noted how her design elaborates the way she sees humans as good people as a result of hypnosis.
Zenitsu Agatsuma
She apparently views Zenitsu as a "weird dandelion" and did not initially seem to reciprocate his feelings. Although the two are rarely seen interacting together, Zenitsu treats her with affection and care.
Injured Zenitsu hugs Nezuko. Zenitsu also protects Nezuko multiple times when she is in danger, evident during Zenitsu's first meeting with Inosuke Hashibira and the battle against Enmu in the train. Eventually Zenitsu and Nezuko would marry and start a family as evidenced by their descendants.
The only thing he's weak to is the sun. That is why he turned other humans into demons and spread his blood so that one of them might find a solution against the sunlight, so he can become truly perfect.
It involves covering a Nichirin Sword with Nezuko Kamado's Exploding Blood to raise its temperature to the point it turns bright red.
Tanjiro then noticed that the other civilians were either dead or badly injured. This enraged him, and he soon stopped breathing, pushing himself beyond his body's limits. His eyes subsequently started to fill with blood seeping into the sclera of his eyes.