Top to bottom, I believe 16/140 is the toughest.
Isenberg - State Champion
Means - State Champion
Graham - State Champion
Arellano - State Placer - 27 wins
Eaton - State Placer - 30 wins
Malay - SQ - 20 wins
Mueller - SQ - 31-7
Winter - SQ - 25 wins
Peak - SQ - 26 wins
But are these really kids? As the topic heading would suggest. This is a perfect example of why High schoolers have their place in this series. This bracket is as close to a "Grand State" that you will get. Will they have their A game? I would bet not. These guys tend to get a little soft after the regular season. But all being equal it should a great bracket to watch!