Ramon's & VH are the only ones with pools that you are considering. If the treetop suites have any obstruction to the view it would be a palm or coconut tree! Not bad in my opinion

Ramon's would be a much busier location than any of the rest. Mata Chica has a pretty clean beach area and Portofino has a swimming section off their dock. Cap't Morgans may work best for you if you want the pool, the remote location and the individual cabana thing. Or possibly Turtle Inn in Placencia (on the southern shore of the country).