He is top 10. The info you need is right there in the OP. He already proved it. A full season. No one plays perfect all season long. So compare the total season to the other top QBs and the statistics tell the story.
Respectfully, we are only having this conversation because of the last 4 games of the season, as @los226 pointed out.
It's easy to create this narrative when using raw stats but for metrics that takes things on a game by game basis, it doesn't work like that. Most metrics have him 14 and lower. I believe that the last 2 games gave us something to build on but to say that he played his way into a top 10 spot ignores over 75% of the entire season. Up until Week 15, the only thing that he could rest his hat on was completion percentage, which means nothing in the grand scheme of offensive production.