Here's your scenario:
South Carolina loses to Clemson.
South Carolina wins the East and goes to Atlanta.
Auburn wins out.
Alabama only loses to Auburn.
LSU loses to Alabama.
Texas A&M loses to Auburn.
South Carolina beats Auburn in the SECCG.
UCLA loses to Oregon.
Oregon loses to Stanford.
Clemson loses to Florida State.
Florida State loses to Florida.
Baylor loses to Oklahoma.
Miami loses to Florida State.
Stanford loses to UCLA in a rematch in the Pac 12 championship.
Alabama vs. Ohio State for the BCSCG.