I don't think there is a good answer yet. You could swap out spells for martial superiority dice (borrowing from the scout and the spell less ranger), but the ranger's spell list is pretty evenly split between utility and damage, and I think you would be losing a lot of utility. I think the ranger doing this would end up being more a fighter wearing camouflage then the scout is.
For a minimal spell ranger, you could change hunter's mark to be more like divine smite and have it do more damage at higher levels, but only last 1 attack. In combat, you would basically use hunter's mark over and over again, and any slots left over would be available for utility spells. If you wanted to be even more minimal, let hunter's mark do more damage (like divine smite) and last longer (like it currently does), but give the ranger the warlock's # of spells that can be cast per short rest (pushed back to start when rangers get spells) and scaling like warlock spells do (no mystic Arcanum).