I got this one
https://www.amazon.com/gp/product/B08GKDMCL8/
They are not as plump as they look on the pictures, but I wasn't disappointed. I use the legs under my knees for my back, and put one of my regular flatter pillows on top for my head.
I've tried wedge pillows before and I really dislike them because I just slide down.

I got this pillow, although it's not as fluffy as it appears, I was happy with it.