you can, just don't lower the car at all. or actually raise it up a little lol that's the only way i know how that will put a checkmark in all those conditions :
i think the coupe can fit wider wheels. it's just the sedan owners tend to be cheap (i only know of few sedan owners that actually do things right lol) and like doing stance more.
you can fit 18x9.5 et35. just with rolling the fenders (maybe a slight pull) and cutting the fender area where it meets the bumper. but the front (assuming that you wanted to run squared) is going to rub on hard u-turns regardless of what you do to the fenders in the front. i drive my car somewhat hard, and it's been fine. i just can't go too fast on dips. rubs in the front.