Pubic make a lot of sense to me too but one thing you gotta think about is ingrown hair cause that can become an absolute nightmare, I think that is more likely to happen to someone with curly hair but also has to do with the skin like someone with a thicker skin maybe if that makes any sense?
Exemple I got some nap hair taken to do my temple points which are actually not curly although I do have curly hair but I was left with so many ingrown hair and huge huge pimples for at least 9months now it got better but I got 2 new pimples last week in the nap again, so that’s one thing to think about but beside that I really don’t see any reason not to harvest hair anywhere, I was actually looking at the hair on my feet few days ago and realized I could definitely use them in the future to replenish my donor if need be.
but yeah I would say
-beard
-pubic
-chest