If your list is based on win/loss record it makes sense. If you look at a few other criteria it can be viewed differently. Webb City is No. 1 for sure.
Harrisonville has 2 head to head wins in the playoffs over Kearney during the decade (2010-2019). In 2010 C4 Quarterfinals 14-10 and 2016 C4 State Championship game 21-14. They have dropped the 2 regular season matchups to the Bulldogs in 2018 and 2019.
Kearney has a head to head in over Ladue HW in the 2016 C4 Semifinal 14-10.
Harrisonville and Ladue HW have never played each other in football.
Kearney record (2010-2019) 124-26
State Championships (1)
State Runners-up (1)
Lost in Semifinals (1)
Lost in Quarterfinals (2)
Lost in Sectionals (1)
Lost in Regionals (0)
Lost in District 3rd Round (0)
Lost in District 2nd Round (2)
Lost in District 1st Round (2)
Harrisonville record (2010-2019) 94-35
State Championships (1)
State Runners-up (0)
Lost in Semifinals (2)
Lost in Quarterfinals (4)
Lost in Sectionals (0)
Lost in Regionals (0)
Lost in District 3rd Round (2)
Lost in District 2nd Round (0)
Lost in District 1st Round (1)
Ladue HW record (2010-2019) 106-25
State Championships (1)
State Runners-up (1)
Lost in Semifinals (3)
Lost in Quarterfinals (1)
Lost in Sectionals (1)
Lost in Regionals (0)
Lost in District 3rd Round (1)
Lost in District 2nd Round (0)
Lost in District 1st Round (2)