I have a handy app on my Retina Macs called Display Menu, it allows for a lot more screen resolutions to be set. If I use System Preferences to set a scaled display at one stage past “default” onto the “more space” setting, it sets the resolution at a 16:10 ratio @ 1680 x 1050. Using Display Menu app I can reduce that ever so slightly to 16:10 @ 1650 x 1050, which makes things appear just a tiny bit bigger.
Actually, at that setting the bezel around the screen appears thicker as its not using all the screen area.