I find that the larger trackpads on newer macbooks help with this a lot because the upper right corner of the pad is easily accessible at exactly the same angle of inward rotation by just pulling your elbow back along the side of your body. The Apple magic, I guess, is being able to have that without constant phantom palm touches.

See https://imgur.com/a/qeRQIFD

An offset trackpad would also work, though obviously would be less friendly to lefties.