Which of these tragedies had the biggest impact on Pro Wrestling?

The deaths of the World Cl promotion (WCCW) it is not limited to just the Von Erich Family....Geno Hernandez and even Chris Adams can be linked to the destructive nature of the environment there. I still say the promoter himself -- Fritz Von Erich -- drove all of them into an early death. And history repeats itself with Vince McMahon as the main cause be it intentional or subjective made a long list of WWE Superstars go to an early grave.