There are 400 pages (over 6,000 films) you can watch free on Amazon Prime. I looked through the first 800 (choices really started to go down hill after that), and these were some of the ones that jumped out at me.
5 starSuper 8 2011 (Good sci-fi film most probably haven't seen)
The Birdcage 1996
The Conversation 1974
The Great Escape 1963
Papillon 2018
The Magnificent Seven 1960
The Big Country 1958 (my favorite western of all-time)
4 starPlanes, Trains and Automobiles 1987
The Lost City of Z 2017
The Falcon and the Snowman 1985
The Good, the Bad and the Ugly 1967
Goldfinger 1965
Thunderball 1965
From Russia With Love 1964
True Grit 1969
White Lightning 1973
The Man From Earth 2007 (a good low budget film I'm guessing most haven't seen)
3 starSands of Iwo Jima 1950
The Report 2019
McLintock! 1963
Canadian Bacon 1995
A Bridge Too Far 1977
Run Silent, Run Deep 1958
Lord of War 2005
The Bodyguard 1992
Support Your Local Sheriff 1969
You Only Live Twice 1967
Escape from New York 1981
Big Jake 1971
What are some of your guys recommendations?