The marketplace has a huge variety of NPCs, most of which don't have art. Even those that do have very old art. Over the course of the next year I plan on using a few of my art commission slots to start righting the fact that many of our lovely NPCs don't have any art. It's going to take a long time before they all have art though, so I've decided to start a poll on who all you would like to see art of!
The way this will work is that is the chosen NPC has pre-existing art they will get an updated half-body portrait in this style. If artwork has never been created of the NPC they will first get a rough design done up like this and then the next time art is ordered they will get a half-body portrait.
I will be starting with NPCs I have personally designed, just because I know best what they look like and thus can give the artist references easily, but eventually it'll extend to NPCs that were designed by other staff members.