Every football championship team has a few things in common. A great pass rush, capable cover corners, and a superb offensive line.
Notice that the quarterback wasn’t mentioned. It is a huge plus to have a great signal-caller, of course, but there have been teams that have won titles with average quarterback play as long as other positions step up. Think Trent Dilfer with the Baltimore Ravens or the Tampa Bay Buccaneers with Brad Johnson. And yes, most exceptional championship squads were indeed led by a Tom Brady, Johnny Unitas, Peyton Manning, Bart Starr, Sid Luckman, or somebody named Patrick Mahomes.