Uncharacteristically snarky Thomas - I guess this is a real sore spot with you. But ok:
http://dictionary.reference.com/browse/artist
art·ist
[ahr-tist] Show IPA
noun
1.
a person who produces works in any of the arts that are primarily subject to aesthetic criteria.
2.
a person who practices one of the fine arts, especially a painter or sculptor.
3.
a person whose trade or profession requires a knowledge of design, drawing, painting, etc.: a commercial artist.
4.
a person who works in one of the performing arts, as an actor, musician, or singer; a public performer: a mime artist; an artist of the dance.
5.
a person whose work exhibits exceptional skill.
You seem to be using primarily meaning #5. I think of it as mostly meaning #1, or 2 when photography is included, which I think by now it should be.