[oregontim]

The Great Race with Jack Lemmon and Peter Falk
The In-Laws (original) with Alan Arkin and Peter Falk
Little Big Man (not exclusively a comedy but some very funny lines and scenes) with Dustin Hoffman

I have to mention one of the best specific scenes, The In-Laws, "serpentine, serpentine"

And also 'A New Leaf,' Elaine May wrote and stars and Walter Mathau, 1971.

[oregontim]

The Great Race with Jack Lemmon and Peter Falk
The In-Laws (original) with Alan Arkin and Peter Falk
Little Big Man (not exclusively a comedy but some very funny lines and scenes) with Dustin Hoffman

I have to mention one of the best specific scenes, The In-Laws, "serpentine, serpentine"

And also 'A New Leaf,' Elaine May wrote and stars and Walter Mathau, 1971.