It's not on the OP's shortlist, but I really enjoyed Hotel
Villa Tre Ville in Positano. Service was excellent, great food, beautiful views, the rooms quite big with great bathrooms, and the ambiance of the whole place felt like being back in the Golden Era. The estate belonged to an Italian composer, but was just recently completely refurbished.
The have a complimentary house shuttle boat to transport guests between the Positano marina and the hotel.