Or you have a designated team of the es, every player and especially the art lmods can send them suggestions about art they believe to be awesome that have been posted in the art board in the month before via pm .

The chosen es (could also be other people) go through said suggestions and filter the not so worthy ones out until they are at a reasonable amount and then a community wide poll i held. And the first two or so or anything that gets a certain amount of votes get showcased.

It would be a lot of work but it would be shared by a part of the community