For shoulders and neck, I do not believe in Range of Motion as the goal. The goal should be alignment that can be maintained.

PTs want to chart improvement with ROM. That means the joints are flexed to the max. That is counter productive for some joints.

My pillow is a floppy shredded foam pillow. It does not lift my head at all unless I bunch it up because I want to be on my side. When I sleep on my back, I bunch up the sides so my head does not roll on the side. My head is almost flat on the bed.

It took some time to learn to sleep like this.