I have a similar issue. Wide-shouldered side sleeper, critical for me to get enough head elevation, or I get a sore neck/back.
The two main UL choices that I'm aware of are the yellow Exped, and the Sea-to-Summit Aeros UL. I have both, and the Aeros is better – it's a little hard to measure exactly, because they both have undulating surfaces, but I'd say the Aeros has almost 1" more height. The Aeros also has a more agreeable plush surface if you are resting your cheek on it directly.
http://www.seatosummit.com/product/?item=Aeros+Pillow+Ultra+Light+&o1=1&o2=1&o3=573-48
A BUFF makes a perfect pillowcase (for the regular sized pillow, not the large), into which you can stuff a few clothes for a bit of extra loft and softness. I sometimes stuff in my Montbell Ex-light puffy for a truly luxurious down-topped pillow.
Alternatively, if you want some dedicated UL luxury even when you're wearing all your clothes, Ben at GooseFeetGear will make you a case to fit. You can have a custom amount of down in it, with a pocket to stuff in extra clothes if available. He made one for me for the Exped that I was using before the Aeros came out, so you'd have to work out sizing with him, but it should be similar.