In terms of credentials, there are two GOATS.
For the four-years-of-eligibility era, it's Sanderson.
For the three-years-of-eligibility era, it's Uetake. Uetake went undefeated, was never tested (according to his coach), and won an Olympic title after his sophomore season.
And if we were going to say there is only one GOAT, I think Uetake has a great argument for that distinction.