“Metternich should be forced to eat my shit.”
The Stranger, 1946. Spoken by Orson Welles.
Amadeus?
Correct!
Hotel porter to Josephine, Some Like It Hot.
“I just LOVE finding new places to wear diamonds.”
You’re on the right track.
Rod Steiger as Napoleon in Waterloo?
Yes. 
“He’s just sitting there drinking coffee”
“Important safety tip!”
Ghostbusters
Face it, girls, I’m older and I have more insurance.
Fried Green Tomatoes.
Didn’t even need to look at the linked answer for that one.
No swashbuckler fans in the audience?
Errol Flynn as Captain Geoffrey Thorpe to Flora Robson as Queen Elizabeth I in The Sea Hawk.
“Darling, forgive me. […] You’re my Juliet, my Venus. […] The other girls meant nothing to me; it was you, you, you!”
Blues Brothers?
Hehe! I can see why you might think that; it reminds one of John Belushi on his knees in the mud in front of Carrie Fisher. But no, that’s not it.
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Reeeeeeeee-VENGE!!!
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Fuckin eh! (hint: said by a certain ‘chef’)
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Nice shirt. What’s it say?
“Who’s gonna hear it down here?”
“I’m not a gentleman; I’m an Irishman!”