John Belushi
Belushi was one of the original 7 cast members of SNL when it started, and best friends with Dan Aykroyd. As a comedy legend, everything he touched was turned into side-splitting hilarity. And with Aykroyd, he also had the successful band The Blues Brothers.
But with that gift, came his addiction. He was fired and rehired so many times on SNL, and was considered a bit of a liability.
He was found dead in 1982, of an overdose, administered by his dealer.
I was just going to comment on the math but you beat me to it.