From what links I've found, that Comet's the only survivor, seems that once the Cubans were sent Russian kit, the rest were scrapped.
Here's another one of the Comet.
Found a couple Staghounds there too, University of Havana.
Guisa.
Another Comet
"Facing Florida Straights"
M47? I assume it's an ex-Bay of Pigs trophy. Playa Giron.
The only other photos of old tanks I can find in Cuba, are T34/85s & Su100s, including these submerged examples.
Plus a submerged IS2M
So, so surviving Shermans in Cuba?