I don’t think being a light sleeper is really all it’s cracked up to be. Light sleeper usually means more sleep needed to feel rested. When you’re “out” it tends to be more restful, at least for me.
But, in the interest of interbed harmony. Do you sleep on your stomach? If so, try flipping over and falling asleep on your back when he’s there. Or fall asleep snuggled up, it’s usually relaxing but I don’t get as deep of sleep that way.
Also, I actually do find my wife’s sleeping fists of fury endearing. It’s also funny how she can take over 80% of the bed with strategic advancement throughout the night. The secret to moving her is to move the shoulders or move the blanket, either one gets her back on her side.
Maybe he just needs to pick up some tricks? It probably calls for further experimentation.