It is clearly Goff. (If you take Jonah Jackson out of the equation. 😉)
Yes, he has had a couple of those games where it's felt like he is a deer in the headlights (with Jonah out), but then you step back and look at his overall numbers in those games and they are still good, with the exception of a few bad plays. But he is consistently executing the offense, delivering the ball with elite accuracy and touch. And last week against NO he did a really good job of buying time in a collapsing pocket.