All time best movies you should watch must

 Here is a list of 20 highly regarded Hollywood movies, spanning various genres and released before my knowledge cutoff in September 2021. Please note that rankings and preferences can vary, so this list is not definitive:

1. The Godfather (1972)

2. The Shawshank Redemption (1994)

3. The Dark Knight (2008)

4. Pulp Fiction (1994)

5. Schindler's List (1993)

6. Fight Club (1999)

7. Goodfellas (1990)

8. The Lord of the Rings: The Fellowship of the Ring (2001)

9. The Matrix (1999)

10. Inception (2010)

11. Forrest Gump (1994)

12. Star Wars: Episode V - The Empire Strikes Back (1980)

13. The Silence of the Lambs (1991)

14. Casablanca (1942)

15. The Avengers (2012)

16. Titanic (1997)

17. The Departed (2006)

18. Gladiator (2000)

19. The Social Network (2010)

20. Saving Private Ryan (1998)

These movies have received critical acclaim, achieved commercial success, and left a lasting impact on the film industry. Remember to check for recent releases and popular movies beyond 2021 to stay up to date with current Hollywood favorites.