Quote - It has relatively thin hair on the crown of the head. And then like a ring (several parts of a ring actually) of denser hair around the perimeter. So the hair LOOKS really lush without the need for zillions of hair strands.

That is key, IMO.  What I'd really like (and I've said this for years) is a skullcap designed for dynamic hair.  It should be relatively low-res, but with a higher-res band around the forehead, temples, etc. where the hair roots show.