There's no such thing as an "official author". The closest to it would be an editor with autopatrolled rights, which means that person has such an exemplary track record of writing suitable new articles that it is felt no longer necessary to review their submissions. There are, as I recall, about 3000-4000 of them in the world, including me. I am a very experienced Wikipedia editor, with 40+ biographies and over 1000 other articles to my credit. See my PM for a sampling of them. I would have to determine beforehand (at no charge) whether the artist satisfies the guidelines for inclusion.