I'm surprised no one mentioned:
The Searchers
The In-laws.......................... (Original Peter Falk version)
The Out-of-Towners...... (Original Jack Lemmon version)
Semper Fi
There's no reason to shoot at me! I'm a dentist!
Though I hated The Out of Towners. Saw it once over a dozen years ago on a Saturday afternoon. Never bothered to see it again.