Goombi, I can't speak to the recipes you posted, but I have made the following at least two dozen times. It is quite popular among my friends and family, even those on the SAD.
Primal-ish Pumpkin Pie
1/4 cup organic ghee (melted)
1/2 bag of almond flour from Whole Foods (don't remember the brand name but it's got a dude with a white beard on it. If you go for another brand, get the finest-ground almond flour available.)
Mix together with a fork and line pyrex pie pan evenly. Cook for about 10 minutes at 400 degrees or until the crust starts to firm up a little. Prepare the filling while the crust is in the oven.
1 can organic pumpkin
3 (or more!) pastured eggs
3 capfuls of "pumpkin pie spice" (mostly nutmeg and cinnamon)
1/4 can organic coconut milk, the creamier the better
A few shakes of cinnamon (to balance out the nutmeg:cinnamon ratio)
Dash of pink salt/sea salt
Six packets of Truvia (this is where I lose the purists)
Whip with a fork or other blending device until homogenized and pour into heated crust. Bake for about 30 minutes at 400 degrees, until you can stick a knife in it and it comes out mostly clean. Eat while watching The Biggest Loser.