Hi Tabby476,
A suitable pillow is an essential part of good alignment for the head and neck and upper body because the gaps between the head and the mattress and the curve of the cervical spine needs to be supported just like all other parts of the spine. Like mattresses … there are certain “needs” that depend on body type and sleeping positions but with pillows, personal preferences play a more important role because the face is much more sensitive to textures, temperature, smells, and other more subjective “feel” based properties of a pillow. There is more about pillows in the pillow thread here.
While I don’t have any specific recommendations … there are quite a number of pillows with a zip cover that use shredded foam or other materials where you can adjust the amount of fill to change the height of the pillow.
Phoenix