Canada

British Columbia.

Kelowna, Kamloops, Abbotsford maybe.

Vancouver Island is great but not many mountains. If you have the money, the North Shore in Vancouver is awesome.

You could live in the Northwest of British Columbia around Haida Gwaii or Vancouver Island

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Move to Baffin Island, best internet in the country. I prommy.

I wouldn't get my hopes up, you want to come here and still work for your current US employer? What does Canada have to gain from that? You're not coming to fill a gap for us, you want to move to reap the benefits without any direct involvement.

Kamloops, BC?

It's got mountains around, it's not completely caught in the Conservative trap, you've got decent amenities of civilization around without the big city or suburb vibe of Metro Vancouver, (I still think it pales as a "city" compared to Toronto), but as a day trip you can head there to sightsee or pick up big box stuff.

If you want something more laid back I second Yukon.

Atlantic Canada. Cheap cost of living compared to the rest of the country, beautiful environment, lots of nice small communities.

If you like mountains and your job is remote then why not try and live in somewhere in Alberta? Canmore is right next to Banff and is absolutely gorgeous. That being said Alberta is pretty much the America of Canada meaning their politics is pretty right wing. If you want to live in a province that's more left wing you can try British Colunbia which is on the other side of the rockies.

Port Alberni, BC

Or Merritt, BC if you want to be on the mainland

Both have all the necessary hospitals, schools, rec centers, high-speed internet, and decent access to larger cities if needed.