Agree with the AC in July (you can put this into your search filters), but if you find a place on Île St Louis with AC, that is my favourite location. It is near the very heart of Paris (which is Notre Dame), with easy access to both the Left and Right banks. The metro is very close by, on the Right Bank. On my first trip to Paris, we stayed in an apartment rental on Île St Louis and loved it. [Updated to add that I just read, after finishing my post, that the Île St Louis place has AC. That would be my choice, then, if the reviews are good and the place checks out on other sites.]
If you do rent an apartment, be aware of a couple of things: not all buildings have elevators. If the apartment is on an upper floor, there may be a lot of stairs to access it, in case that would be a problem for you. If there is an elevator (and be aware that the elevator would be tiny), the listing will usually say so. Note that, in Europe, the "first" floor is not the ground floor, but what we would call the second floor, so figure that into how many flights of stairs there would be.)
Paris restricts rentals, and they are supposed to be licensed, but, apparently, it is easy to throw a fake license number onto a listing, so, if you go through Air BnB, check that the apartment is listed on other platforms, as well (e.g. Booking.com, VRBO). You can usually do this by searching the descriptive heading of the place. Note that a number of rentals in Paris are not dedicated rental units, but places where the owners actually live (not while you're there), as they are limited in how many weeks per year they can rent for.
All your hotel choices are in good, central areas, and they all list air conditioning, but of those choices, #3 would probably be my second choice, just because it's closer to the Seine (my preference) and to a Metro station.