Last month, while crossing the North Atlantic on a cruise ship, I encountered a dead cetacean at 49.130 N, 33.4363 W (i.e. in deep water, approximately 200 nm W of the Mid-Atlantic ridge and 600 nm NNW of the Azores).  Photographs of the animal can be downloaded from here:

The total body length was was approximately 4-7 m. The length and shape of the pectoral fin, as well as the shape of the melon and mouth line, suggest to me either a pilot whale or a Risso's dolphin. I would appreciate any further opinions on the animal'a identity.