Just want to second the suggestions and recommendations about Pueblo Bonito Sunset Beach as a fine fit for your original description of your "wants". My wife and I are owners, let me say right off (I am an active 72, she a spirited 57 yrs.)
We "own" a two bedroom/two bath Presidential unit. Our last visit was this past February; we stayed in Villa 27, which is right in the middle of the resort, just a one minute walk from the main building (where two of the restaurants are as well as the spa/fitness center, concierge desk, small store, shuttle to town.) It has a quiet pool right behind it (you feel like it's your private spot) plus it has elevators (not all Villas do.) All units at PBSB have an ocean view and large balcony; in the winter months, you get both sunrise and sunset from most of the balconies. If you haven't already, you might want to check out the comments on TripAdvisor.com. They are pretty much right on. Oh, in addition, I want to say that we only left the resort grounds twice during the week; otherwise we relaxed totally and completely on the site (and watched the whale migration only a hundred or so yards offshore from our balcony, among other things. ) An added bonus: the resort employees we encountered, without exception, were incredibly friendly and helpful; they all seem to be very happy to be there, too. And, no, I don't get a commission from Pueblo Bonito! Just great anticipation of our return visit again this coming February.