Blue Dahlia and 3:10 to Yuma from the 50s. Much, much better than the recent remake. Blue Dahlia had a lot of nice one-liners of great wisdom like "Practically all the people were strangers when I first met them."
I actually like a lot that the older movies are minimum half as long as the newer ones.
You might like Bad Day At Black Rock. Lots of raw emotions come to the surface.
And who doesn't like Spencer Tracy?