The publishing industry is changing, and I live in the Mecca of indie publishing. The idea of Editor as arbiter or taste is a limited one, a little old-fashioned. Editors exist to make written work better.
That can take a variety of forms, from structural editing to proofreading. And not just for what we typically think of - a novel going through traditional press, to be issued in dead tree format. Academic papers require people to look them over to make sure a coherent point is being made, proposals for books require proofing, limited runs of guidebooks for use by museum staff at a tiny museum need to be edited for clarity and flow. Then we get into the indies: people eschewing traditional publishing in favor of epublishing and print on demand and retaining control over the entire process of their book. They need editors, too, ones who will work with them to make sure they walk away, happily, with the best their book can be.
I like to think I help with that, as well as aiding in epublishing. Like most freelancers, I'm willing to provide samples: I will go over the first five pages of your manuscript for no charge, to see if we can work together.