Interesting and very informative thread based on growers experiences in cold climate. I have moved last year to my new house, this is my second winter here. It is slightly colder here but I have a few fig trees in ground that has been here for a few years.
Macool is in ground and refuses to die, I let it grow freely in the middle of the property where it has always been, and gets some die back but grows back and fruits.
Brooklyn white, is very vigorous grower, even when it dies back it grows over 10 ft. in one season. It's a late variety usually ripens in september/october, you can trick it to fruit sooner by pinching the new growth.
Dark Portuguese, excellent producer and seems to be the most reliable in my zone, planted it in ground at new property 2 years ago.
Other varieties that have done very well in ground in my area unprotected, Salem dark, Syrian Dark, Syrian Long, Ronde de bordeaux, Malone, Sumacki (cold hardy can be a shy producer), Chicago hardy and similar varieties. These are just some but there are several others.
Bass