You have quite the pattern going on with the couch already, plus the one floral throw pillow. You may want to stick to a similar shape if you want something patterned, such as a really simple white rug with some big chunky black stripes. Probably not more than two or three. Too much pattern and your eyes will want a break! There's a lot of light colors in that room, and great lighting with the windows! Maybe ground the space with a mid to dark toned rug.

Thank you for your insightful observations. I was thinking along the same lines!
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I rhink you can select a more interesting area rug, but I would replace the floral pillow with something more interesting.