In Schindler's List, Neeson and Fiennes have electric screen/stage presence, and go off well together. Kingsley does well too.
A lot of ground already covered by others, so I'll chuck in my two bob:
if
Wilde
Michael Collins
In the Name of the Father
Romper Stomper
All the old Clint Eastwood ones (Western and Dirty Harry)
The Seventh Seal (Go Max Von Sydow!)
The Greatest Story Ever Told (John Wayne told to show some awe

)
Spaghetti Westerns, particularly, DJANGO, the man with the machine gun in the coffin
Christopher Lee Dracula films (the early and good ones)
The Mission (OUTSTANDING!)
Full Metal Jacket
Das Boot
Triumph of the Spirit (Willem Dafoe, not Leni Riefenstahl)
Metropolis
Triumph of the Will (as a study of propaganda techniques)
Manchurian Candidate
Ferris Buelers Day Off
The Flodders
Johnny Suede
My Own Private Idaho
L.I.E
Strangelove
****oo's Nest
Fritz the Cat
The Longest Day
To Hell And Back
Peter's Friends
Some French film about the events in Algeria late 1950s
Taxi Driver ( Watch it 20 times in row, and then go walking the streets

)
Rosencrantz and Guildenstern Are Dead
The Wild East (Russian Western with bikers and circus dwarves)
Platoon
The Dear Hunter
Papillon
Wall Street
My Life as a Dog (Lasse Hallstromm)
EXCALIBUR!!!!!!!!!!!! ABSOLUTE CLASSIC
Catch-22.
Midnight Cowboy
Deliverance
The Ipcress File
The Fourth Protocol
Fatherland
The Day of the Jackal
The Odessa File
The Boys from Brazil
The Italian Job ("Fellas, I got an idea.")
A Fish Called Wanda
Look Back in Anger (Burton and Branagh versions)
The Usual Suspects
The Professional
The Visitors
The Bridge (v. good WW2 German)
Starship Troopers (If only for the amusement value of the crypto fascist uniforms)
Escape From Sobibor
Some sub thriller with Rutger Hauer and Martin Sheen
Ten Days that Shook the World
Field of Dreams
I'll have to think, and then add more.
Feck!!!!!
I forgot Land and Freedom, a very, very great pic