If a letsrun poster can think of it, someone else thought of it first.
According to aplus.com the most prolific actors who die in movies are:
1. Christopher Lee, 60 deaths, including 10 as Dracula.
2. John Hurt, 45 deaths, including the chest burst scene in Alien.
3. Bela Lugosi, 36 deaths, he died in 31% of the his movies, #2 on the list.
4. Vincent Price, 32 deaths, Edward Scissorhands was his last role, he died, he was also really dying.
5. Samuel L Jackson, 28 deaths, besides being eaten by a shark he also died in a video game.
6. Sean Bean, 25 deaths, In "The Martian" only his character's career was killed.
7. Charlize Theron, 25 deaths, she has died in 48% of her movies - #1 on the list.
13. Bill Paxton, 15 deaths, the only actor to have been killed by an Alien, a Predator, and a Terminator.
https://aplus.com/a/actors-who-die-most-on-screen