We love Kauai Beach Villas and Kauai Coast Resort at the Beachboy. Both have direct beach access, and some units are oceanfront. However, the ocean can be rough and the beach is not considered suitable for swimming.
Cliffs Club is oceanfront and has stunning ocean views but not a beach. The resort is at the top of a bluff overlooking the ocean. I haven't stayed at the Shearwater but I think the same is true there.
I've driven by Lawai Beach Resort but haven't stayed there. It's across the street from a beach that's popular for snorkeling.
The other Wyndham resorts on Kauai (Bali Hai, Ka Eo Kai, Makai Club + Cottages) aren't on oceanfront property.
On Oahu, Waikiki Beach Walk isn't oceanfront but it's a short walk (maybe 5 minutes?) to the beach. Royal Garden is a bit farther away but still within walking distance.
I haven't stayed at any of the resorts on the Big Island. Hopefully someone else can weigh in on those.