Jen Kennedy Designs on Etsy is an artist who signed up yesterday! She's incredibly new, but her work is amazing, and I can't see it taking too much time before she becomes established on Etsy. Currently, all her listing are original artwork - working mainly in acrylic, but there is come collage on some of the pieces as well.
From top left to bottom right: Original 3 Barn Ridge Canvas Painting, Collage Country Original Art, Color Block Original Painting, and Original Abstract Art.
Since this is an incredibly new artist to Etsy, I can imagine that she'll be adding more to her store soon - this is one store that you'll want to "heart" and check on a regular basis!