There is only one nationally dominant team in my area, because they get all the best players from the entire East Bay Area. I'm not sure if you've heard of them, but De La Salle High School in Concord, CA is one of the best high school football programs in the nation and can be put up against many dominant southern teams and come out with a W. They have the most players in the NFL for any high school. Past players include: DJ Williams (Backer for the Denver Broncos), Kevin Simon, Demetrius Williams, Maurice Jones-Drew, many more...
Here are Maurice Drew's highlights in De La Salle (#1) vs. Long Beach Poly (#2) his junior year.
http://youtube.com/watch?v=8lfItNsKUEU