According to Raffaele et al, Western tanager has been found as a vagrant on Cuba, while hepatic tanager has yet to be seen in the Caribbean incl Bahamas. That leaves Summer and Scarlet as the less unlikely, where Summer is an uncommon migrant and rare resident, while Scarlet has status of rare migrant primarily in September and October, and even less frequent in March to May. A point to notice according to Raffaele et al. is that females have white (scarlet) or yellow (Summer) wing linings. Was this noticed during the sighting?
According to Howell and Webb (Mexico), Scarlet female has Lemon-yellow undertail coverts and wings darker greyish edged olive. These are pointers that I cannot see in the photo? It looks as if the undertail is similar to the rest of the underside.
Overall, summer for me.