Just using a jigsaw, I rounded the top of one board for the head and neck and scalloped the bottom edges of the other board. (I just "winged it.")
I attached the wing part on the back with a couple of screws, this makes it easy to take apart to store for next year.
One angel was dry brushed with white paint. I also painted white on all the edges.
My angels are about 25" tall and wide, but you could make them larger or smaller.
Something very simple, but effective.