The fridge in our camper is in a separate compartment. When I'm in bed, my head is right next to the fridge.
To get around the "fridge noise while sleeping" issue, I bought an Autofridge. They can be turned off overnight.
Problem solved..........
...........(but it's very quiet, anyway).........
I also have a 35L ARB fridge that is VERY quiet. It would probably be OK, too.....