I would go for a modern style, with big blocks of the dominant fabrics and use the orange and gray as sashing. TO be honest, I'd delete the tiny dot fabric-- it doesn't really add anything to the others, and the color is off-- though that may be photo. If you feel the need to add another color, can you pick up what looks like a dark burgundy with gray tones in the print? Or add a grunge gray to go with the other grunge fabric.