Which coach led the Pittsburgh Steelers to four Super Bowl wins in the 1970s?

Which team did Vince Lombardi lead to victories in the first two Super Bowls? Which head coach has the most wins in NFL history, with 347? Which head coach won six Super Bowls with the New England Patriots? Which coach led the Dallas Cowboys for their first 29 seasons? Which coach built the 49ers dynasty of the 1980s with the "West Coast offense"? Which coach won Super Bowl XX with the 1985 Chicago Bears? Which coach became the first Black head coach to win a Super Bowl, with the Colts in Super Bowl XLI? Which coach won Super Bowls with the 1986 and 1990 New York Giants?