In 2004, Tad Friend wrote a great writeup on the career of Harold Ramis that appeared in the New Yorker.
The following movies were all directed and/or co-written by Ramis:
These movies are comedy legends. I think that I have watched Stripes more than any other movie, and lived a lot of it despite never being in the Army. I would say that this group of movies represent a level of comedy mixed with action genius that would not be repeated until the likes of "Anchorman" and its ilk.
What made these movies so important, and so funny? Coming from the Second City improv crowd, Ramis brought that same type of comedy, a comedy that relies on imperfection, to hollywood movies:
“Sloppiness is a key part of improv,” the screenwriter Dennis Klein told me. “And Harold brought that to Hollywood, rescuing comedies from their smooth, polite perfection.”
In addition, Ramis found a voice for his generation's primary traits, turning a bunch of different characteristics into a message that could be neatly distilled for the mass market:
He took his generation’s anger and curiosity and laziness and woolly idealism and gave it a hyper-articulate voice. He wised it up.
Via The New Yorker
The EM-51 Urban Assault Motorcycle? (2012)