If you want one name, the 1st is beyond a doubt Jacques Yves Cousteau.
If you want more names, add ones like Frederic Dumas and maybe Philippe and Jean-Michael Cousteau (perhaps in their own right, but definitely because of a very famous last name).
Other famous divers from more modern times include:
- Nuno Gomez and Pascal Bernabe (world record setting deep divers)
- David Shaw (famously died on a 900 foot cave dive body recovery)
- John Chatteron and Richie Kohler (achieved fame through discovery of U-869)
- Dick Rutkowski and Tom Mount (modern founders of technical diving)
- Sheck Exley (pioneering cave diver)
- Gary Gentile (world reknown wreck diver)
- Jarrod Jablonski (founder of DIR diving)
- Clive Cussler (author)
- Peter Gimbel (famous for diving the Andrea Doria)
- Lloyd Bridges (actor)