In the modern pass friendly era QBs win championships, but they can’t do it on their own. The last 20 Super Bowl winning QBs:
Super Bowl 38. Tom Brady (MVP)
Super Bowl 39. Tom Brady
Super Bowl 40. Ben Roethlisberger
Super Bowl 41. Peyton Manning (MVP)
Super Bowl 42. Eli Manning (MVP)
Super Bowl 43: Ben Roethlisberger
Super Bowl 44: Drew Brees (MVP)
Super Bowl 45: Aaron Rogers (MVP)
Super Bowl 46: Eli Manning (MVP)
Super Bowl 47: Joe Flacco (MVP)
Super Bowl 48: Russell Wilson
Super Bowl 49: Tom Brady (MVP)
Super Bowl 50: Peyton Manning
Super Bowl 51: Tom Brady (MVP)
Super Bowl 52: Nick Foles (MVP)
Super Bowl 53: Tom Brady
Super Bowl 54: Patrick Mahomes (MVP)
Super Bowl 55: Tom Brady (MVP)
Super Bowl 56: Matthew Stafford
Super Bowl 57: Patrick Mahomes (MVP)
The outliers there are Eli, Flacco and Foles, who were average QBs who had great defences and ran hot in the playoffs. But it’s extremely clear that QB is the single most important factor, and pairing a top tier one with a great defence is the perfect recipe for success.