An Elite Team is a team that finishes in the Top 5 of the AP Poll or any team in the Top 15 that has defeated another Elite Team.
Listed in the chart below are the Elite Teams by season from 1936-2018. I use 1936 because that is the first year of the AP Poll.
Underneath the team name are the other Elite Teams that particular team defeated. The National Champion is listed first at the top and the runner up below that. You can scroll to the right using the bar at the bottom of the chart or the wheel on your mouse.