>>1973289885 here.
Hogan
Austin
Vince
Rock
If you removed any of those from the wrestling industry then it would look very different. While I love Savage, Bret, HBK, Angle, etc as workers, they were just good workers. Cena carried the company but feel like you could have plugged anyone into that. HHH has had a huge impact on WWE but not across the whole industry.
Hogan and Vince basically invented modern professional wrestling as a TV product. Austin saved the biggest company, and Rock legitimised it to Hollywood and paved a way for more crossovers to the mainstream.