There are several top of line 16-gauge doubles, made by Husqvarna, Merkel or Sauer that fill the bill. Some are hammer guns, some have internal hammers. The actual gun would have to be a "magic wand" in my hands -- some of these guns are. I would expect that some 16 gauge doubles made in Italy or Spain would fill the bill too. Can be either SXS or O/U.
Nothing made for the CAS market, no pump, no autoloader, no American, no Russian, no Chinese, no Japanese made double makes the grade. Some of the Japanese made doubles and O/Us are close.
Lars