I live in NH and plugged it for Eagle a while back when he solicited suggestions for a destination. Now, I'm not on a campaign to increase the population, but …
I wrote; "New Hampshire. No sales or income tax. From the S. Western part of the state you can reach; the ocean, the mountains and Boston (if you really want to) in less than two hours. Citizens government. Not so Left (we're working on the MA transplants) and a good economy even in these times."
The state meets most of your criteria. The southern tier of the state has spots of concentrated population, but consider the largest city's pop is just over 100K. 2A friendly.
Four distinct seasons (for the most part). No yahoos burning buildings or removing history.
As someone noted in response to my post on Eagles thread, property taxes are third highest in the nation, so there's that. They're offset by the benefits.