Is there a maximum number of author for a blog?

by

  1. You can have as many authors as you’d like.

  2. If the artists are not the authors of the blog posts, I would consider using a custom taxonomy instead, because it would be a more accurate model.

EDIT
As it’s been pointed out in the comments, taxonomies don’t have built-in meta data, and custom post types or users are sometimes easier to handle.