Beating the TN 5A State Champ, & #5 overall ranked team in TN, 55-10 in 2017 is a pretty good case Id say.
KC would've been #4 in TN (or maybe better) without that 55-10 loss to ELCA OoS.
KC had 3 losses... A 45 point loss to ELCA, a 36 point loss to the #1 team in TN Brentwood Academy, and a 7 point loss to the #2 team in TN, Maryville.
So yeah they would've had a case in 2017... And all of their teams from 2015-2018 have been around the same quality, 2015 probably being the weakest. And 2019 is suppose to be very good too.
They are also 49-1 in their last 50 games. I think they qualify as a Top 5 TN team atleast the last couple years.