I Thick they're more great Prison films than any genre, My 5

Shawshank Redemption
Cool hand Luke, who can forget the car wash scene.
The Hill (Sean Connery)
Brubaker
The Green mile

And i can think of another 10/15 more Classics

“That’s a joke son, I say, that’s a joke.” “Nice boy, but he’s sharp as a throw pillow.” “He’s so dumb he thinks a Mexican border pays rent” “ “Son… I say, son, some people are so narrow minded they can look through a keyhole with both eyes.”__ Forhorn Leghorn

Scum
Merry Christmas Mr Lawrence
Cool Hand luke
Birdman of Alcatraz
Papillon

I ride a GS scooter with my hair cut neat
I wear my war time coat in the wind and sleet.

I agree with most of the above so no point repeating.

I will add:

White Heat (James Cagney)
Two Way Stretch (Peter Sellers)
The Big House (1930)
San Quentin (Bogart)

One more point

Mean Machine (original obviously)
The Hill
Con Air
Two Way Stretch
The Great Escape

The ones I like not mentioned above

King Rat
I am a fugitive from a chain gang
Bridge over the river kwai
A Prophet

The original, agreed