Josh Allen is so good that 2 of his last 3 OCs (all rookies at that) landed or will land HC jobs, Gabe Davis got a huge contract in Jax, Diggs became a top 2 WR and Brandon Beane and Sean McDermott still have jobs. Remove Josh from this equation, none of this happens.
Give Josh, Andy Reid as a HC, and he tops Brady as the GOAT