So here's Alan Clayborn, the 4th level ranger. Defensive CR is 1/8, moved up to 1/2 because of the 17 AC. Average damage works out to 15 per round, and 19 if you count in hunter's mark, so CR 2, with +6 to hit moving it to CR3. Average works out to CR 2.
Hey, these NPCs would be of use to...