My dog either sleeps on top of me or leaning against me. She's also a pillow hog.
My dog likes to lay/sleep on his right side with his head facing north. Does your dog have a preference?
I don't have a dog but I have a cat that likes to sleep in the most interesting places. I was sitting against a pillow leaned on the wall while I was playing a video game. One of my cats, Almond Coconut, crawled between the pillow and the wall and fell asleep. I heard him snoring and snapped a picture as he woke up. He was very content and comfortable, lol. (The picture tilted during upload)
My Basset hound just sleeps wherever he wants. He's kind of long so it looks like he's in a corkscrew position all the time. Never have seen a dog sleep all crooked like that before.