And those were the ones I could find that are not like... well, most other unihabited islands are either very, very far from the nearest civilization, or are set aside protected nature resverves, or both.

Devons Island, for example, is literally used as a nearest terrestrial equivalent to Mars, for NASA and other space agencies to do experiments.

There are other islands that could potentially be considerable, but ... they're usually very remote, and while they do have some population, its basically all scientific researchers or equipment operators.

Its gonna be pretty hard to find anywhere to settle that would not involve colonialism, or utterly extreme distances from nearest logistics points and/or essentially impossible weather/climate conditions.

... Other than again potentially New Hampshire.