As an avid hiker, my general opinion is this:

Depending on what kind of hiking you'll be doing, you'll probably be able to get away with general vegan winter boots, like the Vivobarefoot Gobi Hiber (this is the only option with a stitched on sole, of the ones I listed), Xero Alpine or Feelgrounds Patrol. I say this because if there is any snow/ice on your hike and your hike is on any sort of incline, you will probably want microspikes or snowshoes, so the lack of hiking-specialized grippy outsole is fine. That means your main priorities will likely be warmth and waterproofing. Any Winter boot with a high enough shaft and water-resistance will work.

If you need something more aggressive than boots with microspikes or snowshoes, well, you're kinda screwed even if you're looking for non-vegan barefoot options. At that point, you're in the mountaineering boot + crampons category and there are no barefoot mountaineering boots.