Of the public high schools, I'd say Palo Verde, Centennial, Arborview, Green Valley, Coronado all are good. I'd say Palo Verde and Coronado are rated the highest for LDS population.

There are private high schools-- Bishop Gorman, Faith Lutheran come to mind, but the academics of these schools are not better than good public schools. If high academic private schooling is what you want, try The Meadows.