Obito Uchiha is one of the main characters in the Naruto series who served as an antagonist for the majority of the Fourth Great Ninja War. Being an Uchiha, Obito was blessed with quite a strong chakra, along with the powers of the Sharingan.
He grew even stronger upon becoming the Jinchūriki of the Ten-tails and even the Four Hokage were no match for him. Most Naruto characters are not even comparable to Obito Uchiha in terms of strength, however, there are few characters who are much stronger than he is.
10 Stronger: Naruto Uzumaki
Naruto Uzumaki is the Seventh Hokage of Konohagakure and one of the strongest shinobi to ever live. He is the Jinchūriki of the Ninetails and has the chakra of all other Tailed Beasts as well.
Naruto also gained Six Paths powers from Hagoromo Otsutsuki, which made him even stronger. He was partly responsible for the defeat of Obito Uchiha during the Fourth Great Ninja War.
9 Weaker: Hashirama Senju
Hashirama Senju was Konohagakure's First Hokage. Renowned as the God of Shinobi, there were only a few characters out there who could take him on in battle and defeat him and Obito Uchiha certainly is one of them.
Hashirama got a taste of Obito's strength first-hand during the War. In fact, Hashirama openly exclaimed that Obito Uchiha was far stronger than him.
8 Stronger: Sasuke Uchiha
Like Naruto, Sasuke Uchiha is tremendously powerful and someone worthy of being called the strongest of all. The only shinobi capable of matching him is none other than Naruto Uzumaki himself.
Sasuke has mastered the powers of the Uchiha and also unlocked Six Paths powers. He was powerful enough to go toe-to-toe against Madara Uchiha, meaning he's much stronger than Obito.
7 Weaker: Tobirama Senju
Tobirama Senju was the Second Hokage of Konoha, following his brother's footsteps after his death. Being a Senju, Tobirama was magnificent when it came to combat. He was powerful enough to fight both Kinkaku and Ginkaku at once, which is certainly a testament to his abilities.
However, Tobirama was definitely weaker than his brother, who openly admitted to being inferior to Obito Uchiha. There's no denying that Tobirama was no match for the Uchiha.
6 Stronger: Might Guy
Might Guy is the former leader of Team Guy and a Jonin from Konoha. Although his skills with ninjutsu and genjutsu were rather weak, when it came to taijutsu, Guy was one of the most powerful.
Might Guy was powerful enough to put up a fight against Madara Uchiha, who was much stronger than Obito. When compared to Obito, Guy appeared to be superior in his prime.
5 Weaker: Hiruzen Sarutobi
Also known as The Professor, Hiruzen Sarutobi was the Third Hokage of the Leaf and one of the strongest shinobi in history. His skills and abilities led to him being known as the strongest of all Hokage, except for Naruto Uzumaki.
Although most of his abilities remained unknown, Hiruzen was powerful enough to defeat Orochimaru, the first and the second Hokage of Konoha despite being about 70 years of age. While strong, he didn't have what it takes to defeat Obito in battle.
4 Stronger: Kakashi Hatake (DMS)
After receiving the powers of the Six Paths from Obito Uchiha and briefly gaining two Sharingan, Kakashi Hatake became one of the strongest characters in the Naruto series, capable of fighting against the likes of Kaguya Otsutsuki.
Although this power didn't last long, it made him nearly invincible and allowed him to deal significant damage to Kaguya. Without a doubt, he was much stronger than Obito Uchiha in this form.
3 Weaker: Minato Namikaze
The man known as the Yellow Flash of the Leaf, Minato Namikaze was quite a powerful shinobi who was feared across the Five Great Nations. His powers allowed him to singlehandedly end the Third Great Ninja War and in the process, become the Fourth Hokage of Konoha.
Minato, while strong, was no match for Obito Uchiha in his Six Paths state. The latter fought against Minato and was able to rip his arm off without much trouble.
2 Stronger: Kaguya Otsutsuki
Kaguya Otsutsuki was the progenitor of chakra on Planet Earth in the world of Naruto. She was the strongest known character in the series and arguably holds that spot even now. According to Naruto Uzumaki, Kaguya was much stronger than Madara Uchiha.
She held enough power to wipe out a space-time and rebuild it from scratch, which is something Obito Uchiha could never do. Undoubtedly, Kaguya Otsutsuki was much stronger than Obito.
1 Weaker: Tsunade Senju
The Fifth Hokage of Konoha, Tsunade was quite a strong Kunoichi, arguably the strongest in the Naruto series. She was renowned as one of the Legendary Sannin and during the Fourth Great Ninja War, she proved her skills as a leader.
Although Tsunade was strong, she could barely fight Madara Uchiha in his base form. Obito, who, in his Six Paths form, was much stronger, was levels above Tsunade.