I'm a longtime fan of the free-flowing watercolors by Millard Sheets, but only learned a few years ago that he designed the murals at Keppel. Unfortunately, they seem rather stiff and formal. I prefer other murals he did for Home Savings (now part of Chase). Here's an article a friend of mine wrote for Westways: http://ww1.calif.aaa.com/westways/2010-09/Pages/saving-the-art-of-home-savings.aspx