1. Jimmy Johnson: 85.2% (1984-1988) — Miami
Jimmy Johnson helped transform Miami into a formidable force in college football in the 1980s. Although Johnson posted a lackluster 8-5 record in his first season in Miami, his changes to a 4-3 defense led the Hurricanes to only drop four more games in the same amount of seasons during the rest of Johnson’s tenure there. Johnson sparked Miami’s home win streak of 58 games (still the current NCAA record), which spanned from 1985-1994, and also brought home Miami’s second national championship in 1987. After Miami, Johnson went onto coach the Dallas Cowboys and the Miami Dolphins in the NFL, and was inducted into the Pro Football Hall of Fame in 2020 following his retirement from coaching.