Le fabuleux destin d'Amélie Poulain (2001) - Haven't seen
Monty Python and the Holy Grail (1975) - Seen before, loved it
Some Like It Hot (1959) - Haven't seen
The Big Lebowski (1998 ) - Seen before... honestly can say I don't get it.
Life of Brian (1979) - Haven't seen
Finding Nemo (2003) - Haven't seen
Groundhog Day (1993) - Haven't seen
Arsenic and Old Lace (1944) - Haven't seen
Ghost Busters (1984) - Yeah this was quite the laugh
Top Secret (1984) - haven't seen
Three Amigos (1986) - haven't seen

More suggestions (keep in mind I am a Rowan Atkinson fan ):

Mr. Bean
Johnny English
Zoolander
Anchorman

People have probably seen these, though.