I have a standing hand towel holder in between the double sinks in my master bath. (re-fabbed.com)
Or I picked up some over the cabinet door hand towel holders from the dollar store that I use in the kitchen but would also work in your bathroom. (re-fabbed.com)
In between the sinks maybe you can put a round tray to coral items & a stand alone hand towel holder since I don't see any in these pics. (re-fabbed.com)