Yeah, it'd be a challenge. I recently jotted some for the category and got more than 50 without even breaking a sweat -- and most of them were probably 1960 thru early 2000s.Comedy movies would need to be made by the kind of comedy. Narrowing a field to 68 comedy movies would be daunting task.
Might require siphoning sub-genres such as rom-com, and perhaps limiting to one film per director or such.