Check out the gallery on Wayne Reynolds. It's automatically generated using files that intersect with the Artwork by Wayne Reynolds and PathfinderWiki featured articles categories. (The intersection isn't necessary, but Wayne has a lot of credits for box and cover art that don't really suit an artist showcase.)
These sorts of galleries and lists are now possible using DynamicPageList, which can also build and sort lists from categories. This extension might even allow us to automate some navboxes, product pages, and parts of portals. For now, this can at least fulfill the gallery-on-page ideas for artist pages and articles.