I don’t think any of your windows are going to be big enough to get the fridge through the opening.
Unless removing the main entry door will give you enough width, I believe removing the dinette slide is going to be your best option,
Update:
Our campers are from the same generation of Lance campers with dinette slides. They probably use the same dinette window and main entry door. Without removing the fridge cooling unit and/or the doors, I think you’re going to need 24”-25” to get the fridge out. The rough openings for the dinette window and main entry door aren’t even that big, so they won’t work on my camper. I’d have to remove the slide to get the fridge out in one piece. Removing the doors on my fridge wouldn’t gain me anything, as there’s a flange on the front that sticks out just as far. I’m not sure if the flange comes off or not.
:):)