There can never be A best movie as there are so man genres and so many styles of filming. Here are some of the best English language films ever made. This is a subjective list and others might find their picks better than mine.
Citizen Kane
Gone With the Wind
A Matter of Life and Death
Bridge on the River Kwai
Rebecca
Casablanca
Some Like it Hot
Roman Holiday
Wuthering Heights
Mutiny on the Bounty
Camille
Queen Christina
The Quiet Man
The Best Years of Our Lives
How Green was My Valley
Jezebel
Charlie Chaplin's The Gold Rush / The Kid / City Lights
Wlt Disney's carton features: Snow White and the Sven Dwarfs / Pinnochio
All About Eve
The Defiant Ones
The Four Feathers (1939 version)
The Good Earth
High Noon (Gary Cooper, Grace Kelly)
It Happened One Night
Random Harvest,
The Search (Montgomery Clift)
Twelve Angry Men
The Winslow Boy
Witness for the Prosecution
Wizard of Oz