competitive for Harvard?

Hi everyone. my son has a GPA of 4.0, ranked number 2 in his class, he is also a National Merit Scholarship semifinalist this year. His first SAT is 1520, and going for a second SAT test next month. He is also an AP scholar with three 5s and one 4. One SAT subject test: 800. He has a recommendation letter from a Yale Professor ( He received an A in a Yale online college credit class). How competitive is he for Harvard( His first dream college)