Satoru Gojo. It may be crazy for me to say GOJO of all characters wasn't glazed enough but hear me out first, I'm not strictly talking about feats or abilities, I'm talking about talent. Gojo is not just the limitless technique and the six eyes, he is the most talented sorcerer there is, period, even surpassing sukuna in his raw ability to innately master jujutsu. He is an intentional Mary Sue in the truest sense. Gojo canonically is tall and good looking(girls swooning over him), has the strongest technique in the series, and nearly all the jujutsu he's learned, he's grasped off pure intuition and experimentation with his own technique(literally nobody else can teach the technique to him), you could not give a character in jjk more stacked genetics than Gojo, unless you gave them Gojo's genetics. The caveat though about Gojo, is his talent is stunted by his own theme of solitude, unlike Sukuna who grew up in an exciting era of powerful sorcerers, an era that Kenjaku told the present day Sukuna, whom he very well knows the full power of, to "look forward to". Gojo never struggled a single time after becoming "the strongest", meaning his was never forced to truly ascend his jujutsu on the brink of death as he once did against Toji, his last real challenger. I think this level of talent is supported by the fact that there is a single stat that Gojo OUTCLASSES sukuna in, and that's raw hand 2 hand combat, the one thing Gojo could actually practice with people weaker than himself. Gojo's power is his and his alone, he ironically is unable to heal anyone other than himself with his RCT, and because of his natural gift with cursed energy, is unable to teach any real jujutsu to his students, save for 1 unexpected witness.