My favorite build. Back story - maybe ex special forces. Green Beret type, behind the lines and all that. Agility and perception are primary with a good dose of endurance, and charisma. Intelligence, luck and strength last but at least average in everything. Will probably start with 3 across the board in everything except luck and boost perception and agility to start.
Alternative, ex cat burglar. But I can't fit the sniper angle in that way.
Interesting thing about this iteration is that the opening is both more and less restrictive. Less because in FO3 you were the kid who grew up in the vault. Your back story was pretty much set. In FO4 you are apparently married with a family - no choice in that - but your back story is less well defined.