Sorry , can’t do just 3. Too many ties.
Fire Sale and original In-Laws
Silver Bears and Big Lebowski
Most of Buster Keaton’s silent features
And
Dirty Rotten Scoundrels
Big Trouble in Little China
Murder by Death
Serial
Phantom of the Paradise
Used Cars
Champagne for Caesar
Marx Brothers up to Day at the Races plus Night in Casablanca
And forgot to mention
After the Fox
OSS 117: Cairo, Nest of Spies