Los Angeles Rams
Mike Martz replaced Dick Vermeil as Rams head coach in 2000. This came after he won a ring with the franchise as their offensive coordinator. Martz held the top job for five seasons and brought them success including another Super Bowl appearance. Sean McVey deserves a mention for guiding his team of superstars to another Vince Lombardi trophy.
There’s no denying that Steve Spagnuolo is the worst coach in Rams history. In his first season, they finished with the worst offense in the league. They fell a long way from the Greatest Show on Earth. Fans celebrated when he left because he was a complete disaster (via Clutchpoints).