Here are rankings I compiled of the best teams in terms of long-term dominance. I scored 1st place at NXN worth 22 pts, 2nd place worth 21, and so on. I didn't fill out every team (there have been dozens at NXN), but I choose some that I knew were historically good.
If I missed any big names, let me know and I can run the calculations.
1st - American Fork - 179 pts
2nd - North Central - 151 pts
3rd - Fayetteville Manlius - 145 pts
4th - Christian Brothers Academy - 144 pts
5th - Great Oak - 115 pts
6th - Conroe The Woodlands - 108pts
7th - Southlake Carroll - 101 pts
8th - Wayzata - 82 pts
9th - Arcadia - 80 pts
10th - Newbury Park - 62 pts
11th - Loudoun Valley - 57 pts