My feet sweat a lot, so in the end I've just given up on trying to manage it with socks and insulation levels and went in the other direction with whole vapor barrier concept.
This blog article is what got me convinced to try.
I'm pretty much using a vapor barrier of some sort anytime its below 20 degrees these days. I like it in that I just don't have to worry about my activity/sweat output at all, and though my toes still get chilled if I was full sweating then stop moving, they never get to bone cold at the end of any day, which has been a huge improvement for me.
Though it probably isn't a 100% vapor barrier, I find the neopene to be the most comfortable VB type thing I've found so far. Definitely my preference for putting on a lot of miles. These are my favorite, but I've also used thinner .5mm:
https://www.nrs.com/nrs-boundary-socks/puec
They definitely develop a funk if you let them. I try to make sure and wash with warm water and make sure they get dry after every use. Dries super fast though.
I've also used
these nylon VBs with a very thin liner sock underneath. They work well too, but the seams can rub, so I like the neoprene better for comfort while hiking. But that nylon style makes for a 100% vapor barrier (unlike neoprene). If doing a week long backpacking trip in cold temps and I didn't have a wood stove with me, I'd use the nylon 100% barrier style just to fully keep moisture from working through to my boot over the days and then eventually getting cold at the end of the trip. I think its pretty common for mountaineers and artic explorer types to go this route. And even using VB's over their whole body.
When in a wall tent with good stove for drying out though, neoprene's my first choice.