Try this. Silk ski clothes against your skin topped with medium weight merino underwear. Wool trousers over this. Same under layer up top with a medium weight wool shirt. If it is really cold I will add a fleece vest. Then a wool sweater. I seldom wear a heavy coat over this, preferring a lighter jacket. I have several camo patterns that I use, and sometimes use a wool plaid. I don't think it really matters as long as your outlined is broken up.
The layering effect does the job. This handles the coldest of our southern weather, which may get into the teens. Do be careful that the layers are not so bulky you can't move.
I generally wear a single pair of wool socks and loose fitting boots. I use sub zero pacs in lower temps, because being diabetic, it is hard to keep my feet warm.
The key is effective layering. Each person, especially northern and western hunter, will need to adjust the layering to his specific needs, but most will find it more effective than depending on a single layer.
Don't forget that you may need to carry some of your stuff in and put it on as you are ready to get in the stand. Don't let yourself work up a sweat, or all the warm clothes in the world will still freeze you out.
I know it sounds odd for a southern guy to be so talkative about handling the cold, but as a diabetic, even moderate cold affects me very severely. Besides, I learned all I know from northern guys.