Hairdresser, hair stylist, barber.
Theoretically, you could call that person a braider, but more likely you would call them a hair stylist.
stylist
bald man
A hairstylist.
You call them by their name...
barber
A person who shaves their hair totally would be called bald. Or else a "skinhead."
A person with black hair is still a brunette. Keep in mind that there are only three hair colors for humans: blond, red (a mutation), and black. Everything else is a combination of genes.
Bald? Maybe?
hairer
a stylist, hairstylist, hairdresser or coifer
Although we have words for natural hair we do not have words for those with un-natural colour.