The AFC is a weaker conference overall this year, and it's clear which teams are the best of the best. Many of the reasons why teams are where they are in the conference is because of the QB play they are getting.
Without a high-end QB, no team is going to sustain long-term success in the league, and the AFC is filled with a ton of young QB talent. Fortunately, the Denver Broncos seem to have one of those passers in Bo Nix, who has turned into one of the more clutch players in the league this year.