I wonder if irradiating by say 10 MeV electron beam could work for raw milk. Perhaps with the right dose, the taste shouldn't be altered significantly, yet the bacteria should be gone
Food irradiation is a bit expensive compared to ultra pasteurization. I'm not aware of any brands of milk that use it. However it doesn't affect taste or nutrition of food as far as I can tell. It would probably work pretty well, although it would be pretty expensive for something as cheap and safe as milk.