What More Must Taysom Hill Do Before He Retires To Be Considered An NFL Hall Of Fame Player?

Personally, I think he has done enough to make it. How long it will take depends on the pageantry of the NFL.
No one in the modern NFL has done anything close to what he's done and broke the records while doing it.
He has a portfolio of an entire NFL team wrapped up in one person and the kicker is, he's pretty good at it, all of it. And the other kicker is - he can probably be a kicker.
Taysom's position is Football Player. An anomaly. I'm not sure if we'll ever see this kinda thing again.
Sure, there will be some who come close, but most won't even make it 2 years trying to do what he does.
We're blessed to have such a thing. Enjoy it.