I was at Lowes today, and stopped by the mini-fridges. I think I found the perfect fridge, just curious with anyone has used it or looked at it too...
Frigidaire 4.4 cf Model LFPH44M4LM $200
They don't have an internal picture online, but there are two glass shelves that pull out. The cooling element is inside the walls, with just 2 screws holding the freezer door hinge, also blocking it so the insulating shelf between the freezer and fridge sections doesn't come out.
Internal dimensions were 28" tall, 18" wide, and ~8" (estimating) deep before the hump. May have to modify bottom lip of door shelves, but I didn't spend enough time to get a good measurement.