I really enjoyed "The Paths of Ateşkazé" by Jeremy Strandberg, in Perilous Almanacs. Two of my players (a married couple) are cavers, and they absolutely loved the descriptions of cave passages— they said it felt very realistic, and a couple times they had to tell us a story out of character about their caving!

There are so many hacks that I think it makes it unlikely that any will emerge as the consensus default. Other hacks than the ones you mentioned: Unlimited Dungeons, Freebooters on the Frontier, Quest World, Maze World, etc.