Gojo is considered one of the two most powerful sorcerers in Jujutsu Kaisen due to his abilities and skills. His fight against Sukuna showcased his peak potential and unmatched fighting skills ...

The somewhat longer answer is that Gege Akutami was heavily inspired by "Naruto" and Gojo is a homage to Kakashi, Naruto's own mentor (who similarly has white hair and covers half his face).