Javier Sotomayor is the only Cuban sportsman I've heard about.
Arguably the greatest high jumper in history - winning, amongst, many other things - the Barcelona Olympic Gold in 1992.
One of only 13 to jump 2.4 metre, or higher - and one of 5 to jump it more than once.
Still in athletics - coaching etc. - the former world record holder is aged only about 50 now.