Madara, no question. His reputation alone put fear in the entire world. Tsunade regarded the name as power itself. The third great ninja war has minato the yellow flash of the leaf and at the end of the war orochimaru as a rogue ninja recruited by akatsuki.
The most feared Shinobi of the Hidden Mist in Naruto, Kisame Hoshigake was a powerful ninja of Hidden Mist's Hoshigake clan. He became an S-Rank ninja after joining the Seven Ninja Swordsman of Hidden Mist.
1 Naruto Uzumaki Is The Most Fearless Character In The Story
Naruto fearlessly fought some of the strongest people in the story, such as Pain, Madara Uchiha, and even Kaguya Otsutsuki. Even when he was the underdog, Naruto never lost faith and pulled through with courage and fearlessness alone.
As an Otsutsuki member, Kaguya is the strongest character in the Narutoverse. However, after consuming the entire Chakra fruit for herself from the God tree, she attained godly feats, making her an unstoppable force in Naruto.
Jiraiya. Jiraiya was an exceptionally competent shinobi, and he was the only member of the Legendary Sannin who could actually beat Itachi. He was trained by the Third Hokage, and learned how to use Sage Mode while training with the toads of Mount Myoboku.
Jinichi Kawakami, a 63-year old engineer, is Japan's last ninja grandmaster according to the Igaryu ninja museum. He is the head of the Ban clan, a family that traces its ninja roots back 500 years. He says that when he dies, the deadly art of ninjutsu will die with him because it does not suit the modern age.
A jōnin ("upper person") was the highest rank, representing the group and hiring out mercenaries. This is followed by the chūnin ("middle person"), assistants to the jōnin. At the bottom was the genin ("lower person"), field agents drawn from the lower class and assigned to carry out actual missions.
In Naruto, there are plenty of strong ninjas, however, only a few could really be considered invincible. Ninjas who reached extraordinary heights were given the title of "God of Shinobi." Throughout the series, only two ninjas were given the title of God of Shinobi: Hashirama Senju and Hiruzen Sarutobi.
While Naruto is an extremely strong character, there are a few that are capable of taking him down. Naruto Uzumaki is the Seventh Hokage of Konohagakure and the strongest shinobi to ever exist in the Naruto series, with Sasuke Uchiha being the only one close to him in terms of power.
Sasuke was stated to be the strongest Uchiha to ever have been born, including Madara. So, obviously, his powers do exceed Madara's. With his Choku-tomou Rinnegan and Indra's arrow, he is almost invincible. As a result, he is also one of the Naruto characters who can defeat Madara.
Not only was he nearly killed by the Fifth Mizukage, Mei Terumi, but shortly afterward, he was also almost turned to dust by Onoki using his Dust Release Kekkei Tota.
Naruto's controversial final villain, Kaguya Otsutsuki, was introduced all of a sudden at the end of the series, making fans wonder why author Masashi Kishimoto would do something like this.
As one of the three legendary Sannin, the three greatest ninjas of their time, Orochimaru is one of the most powerful ninjas in the series. He's also the most long-running villain in the entire series so we get to know him quite a bit by the end.
The strongest character in the anime series, Anos is pretty much unstoppable as he is the reincarnated “Demon King of Tyranny”. He demonstrates his absolute power through his Origin Magic Immunity, an ability that grants him immunity to the magic of spell casters who borrow the powers of their god.
1 Naruto Uzumaki
Quite possibly the biggest known war hero in the series, Naruto Uzumaki took part in the 4th Great Ninja War and did incredibly well to lead the alliance while he was at it.
1 Kaguya Otsutsuki
As the Ten-Tails jinchuriki, Kaguya had an incredible amount of chakra, far superior to any character in Naruto. This allowed Kaguya to easily use her kekkei mora techniques. She is the only character in the series who was able to create a Truth-Seeking Ball, so huge that it could destroy the earth.
1 Baryon Mode
Baryon Mode powered Naruto Uzumaki up to great levels, and made him strong enough to overpower Isshiki Otsutsuki in battle. This transformation made him the strongest character in the story, and is Naruto's strongest form by far.