If you want two top doors, look for a 28 to 30 wide refrig. If one door is ok, can look at a 24 wide unit. Double check the air flow and the hinge side clearances. I think you will have some choices, you have the space! Just.....

I *think* Samsung are the only ones who make a 30" counter-depth French door fridge, if that's any help! I usually check details out on A J Madison's website, as they seem to stock every fridge (indeed, every appliance!) available in N America, and have a very good search engine, reviews, etc.

I'm just not sure what the dimension needs to be to be able to open the door enough

ask the appliance salesfolks, and/or look at the web sites for the models you're considering, and/or take a tape measure to the show room and see for yourself. better safe than sorry.

Find the manual for the models you are considering, usually clearance requirements for installation are in there somewhere. The fridge against a wall thing can be tricky though. We just gave up looking for a fridge freezer that would fit in our space and are doing a fridge only in one area and freezer only in another. All the fridge freezer options we could find that fit our space weren't big enough for our needs. (We frequently have 5-6 people at a meal, with some dietary restrictions to deal with, so we need a decent amount of space to not be shopping all the time.)