I can't really give you advice, as I'm still on a healing path, but I can give a different perspective. I have basically all European ancestry. I've had vitamin D deficiency twice, confirmed by bloodwork. Despite being put on high, therapeutic doses of vitamin D, I did not feel any significant difference. I've also taken vitamin D3 supplements on my own and never felt any difference.
Given my ancestry, I am wondering if the "optimal" vitamin D range is even valid for me. Obviously my European ancestors would not risk frostbite and hypothermia in order to sit around naked in the snowy winters so that they can catch what little bit of sun may peak through the dark grey winter clouds.
So, whatever you can get through food is probably ok. I would consider what kind of climate your ancestors lived in and how they may have gotten vitamin D. Of course, humans do evolve with their environment, so if you live in a very sunny climate it may be better to get sun (animals in sunny climates may not have as much fat stores and thus less vitamin D).