Is he at all interested in a service academy? Just the few things you list hit big on several of the categories the academies look for: academics, leadership, character/integrity. I know the SAs do not appeal to everyone but, if your son has any interest, the academies highly value what he already demonstrates. They emphasize quality over quantity and are not impressed by long lists of ECs. His Eagle Scout rank would earn him top points in their leadership category and is precisely the type of “narrowness” they are looking for. If he is in good physical shape and participates in any sport at all (any level), he might have a good shot at one of them.