I think Iceland and New Zealand are also contenders. Iceland absorbs all of Greenland, large portion of Nunavut, and a sizable chunk of Alaska. New Zealand grabs a large part of Antarctica.

I think though if Nuuk were to be included the dynamics of Iceland would change significantly, and similar if you include New Zealand’s already claimed territory on the Antarctic, then their gains are less impressive.

Some of the small European countries like Monaco, Lichtenstein, San Marino, Andorra and the Vatican do quite well for themselves.