For everyone who wants the Ranger casual, vest and scarf outfits without having to steal or kill for them:

Just north-west of Devil's Throat is a campfire with 2-3 super mutants and 2 rangers. They respawn every
3 game-days, so you can get all the variations of the outfits The rangers are always killed before I get to
them, as the super mutants usually pack a light machine gun, mini-gun or missile launcher.