What Cathy said...One of the beachfront condo resorts also has a fabulous pool complex - although several of them do.
Roatan Resort | Infinity Bay Spa & Beach Resort
You might (or not) want to stay away from the area near Bananarama as the cruise excursions go there.
There's also somewhat of a beach in the West End but it's nowhere near as nice. At some of the lower priced proerties it's across the street and somewhat disappears at high tide.
It's OK at Sueno Del Mar if that property is of interest - it's kind of older and budget. Not sure if they have a pool either.
Upscale nearby - Xbalanque - arguably one of the nicer boutique properties on Roatan. Notice the beach at the start of the video though - there it's not particularly deep or wide - there's another resort next door.
The West Ebd a little more interesting area from a non-dive perspective than West Bay IMO. More eclectic mix of shops, restaurants, most of the nightlife etc.
Anything around Half Moon Bay - although some might show a small beach - is actually mostly on ironshore. We rent on the east point - the waves crashing into the waterfront at night are soothing but 10' down the cliff..
One more to look at - Luna Beach Resort. It's sort of 1/2 way between West Bay and the West End - you can walk to the West End for dinner - which you will do since they don't serve it. Decent beach, pool, diveshop on-site. Pretty extensive snorkel trail there if your SO does that. It is 10-15mins walk to the West End though.The water taxi does pick up off their dock and goes to either area.
Sand Flies everywhere so use something with Deet in it anytime you're on the beach. Especially at dusk.