The conifers here are all edible. The young soft green growth in early spring is supposed to be tasty. I'm planning on trying to saute some Douglas fir greens mixed with some pine nuts and then mixed in with whole wheat pasta and olive oil plus garlic and perhaps rosemary. It will be fun to try!
But there are also other edible evergreens that aren't conifers. There is an evergreen huckleberry here that gets up to 12 feet in the shade and is very dense. The berries are ready in August but keep ripening through the fall and can be harvested through December!
I love that huckleberry and I have planted 8 of them on my wild homestead. All are doing great but they need more time to grow before they will produce much. I'm planning on adding around 2 to 3 dozen more up and down my hedgerows once the other plants get established enough to provide a good amount of shade.
Strawberry trees are also edible though with mixed reviews on the taste. But I planted one a couple years ago and it's doing good and has grown a lot.
There is also the California bay tree. It can be used as a substitute for bay leaf in cooking. Very similar flavor just stronger so you use less of it.
I always try to include evergreens in my hedgerows and food forests. As you said they are great for birds and other wildlife and many of them provide a lot of other functions too!