1. Robert De Niro:
Personally, I think his acting is the best in the history of cinema, and he has starred in many very classic films, such as "The Godfather Part II", "Once Upon a Time in America", "Taxi Driver", "Raging Bull", and also that epic-level "1900".
2. Marlon Brando:
I think he is absolutely the "King of Hollywood". He has an aura that makes people submit to him. He made the constellation of cinema extraordinarily bright. He is the model for later generations of actors to learn from and imitate. Personally, I really like his performances in "The Godfather" and "Apocalypse Now".