Josh Allen is a top performer and he generally brings it when the lights are brightest. Same with Mahomes (perhaps even more so, although I'd argue the difference between them is that Mahomes has had more support around him in terms of coaching and other guys stepping up to make THAT key play).
Drake can play at their level generally, the question will be can he do it consistently in the biggest moments. If he can, then he absolutely belongs in that tier. So far there's nothing that says he can't do it. The most important quality he has shown beyond the physical capabilities and his willingness to work hard is his emotional resilience. He always bounces back and does so within the same game. That was Brady's most defining quality that he always showed from Day 1 (and what I believe separated him from Peyton Manning), and Maye is showing that as well.
And remember he will continue to improve - he still has quarters/halves where he struggles to diagnose what's going on, he will sometimes makes bone-headed plays when he should just eat a sack (see last night). These are things that will improve a lot with experience. His proven work ethic almost guarantees he will improve those things.
Beyond getting to the top of the position, from a historical standpoint I think the next challenge after that will be to stay hungry after reaching the pinnacle (what made Brady THE GOAT)...but let's take one thing at a time.