Planefag confirms P-3 Orion tail No. 160764 was in the areas on the 3rd August. No data on ADS-B Exchange for the others. Checking more sauces.
I've found lots of corroborating tweets and posts about P-8s 169328 and 169002, as well as P-3 160764.
The P-8s are identified as belonging to VP-47 "Golden Swordsmen" and the P-3 is from VQ-1 "World Watchers".
Patrol Squadron 47, also known as "The Golden Swordsmen", is a maritime patrol squadron of the United States Navy based at Naval Air Station Whidbey Island, Washington, attached to Patrol and Reconnaissance Wing 10. The squadron currently flies the Boeing P-8A Poseidon.
The planes check out.
Scary trips confirm
Roger that, o7
One of VP-47's artworks. Where's Swordy?
There's a blip on ADS-B of 169002 over Reykjavik on the return trip today but that's it.
Roger, thanks.