I actually didn't find "Shaun of the Dead" as funny as I thought I would - it was off-beat but short.
I still highly recommend the series "Spaced", which was a complete indulgence of their off-beat humour.
And although there will be cultural references that people outside of the UK may not get, there's still a lot to appeal - it's not like you need to know anything much about London, for instance, to "get" Shaun of the Dead.
[attachment removed from archive]