Improving hair density and hiding the scalp

[Not giving up]

What is the best way to improve density? I'm pretty much a diffuse thinner. I still have pretty decent hair and my NW is like a 1 I guess. But the density is pretty bad. Under certain lights my scalp is pretty visible with my fringe up. I know this is pretty lame and isn't exactly bald, but I'm wondering which is the best option to thicken the hair, rather than regrow it as such.

Fin and minox being obvious choices I know, but is one meant to be better than the other for density?