Seeing the name I wouldn't be able to recognize it but after you mention Caddyshack and Vacation I remember him... Harold and his great movies will be missed greatly.
But it wasn't Harold's fault. It had a clever plot and storyline, and the script wasn't too bad either, but the lead actors just didn't deliver. Jack Black and Michael Cera basically played themselves, David Cross was just plain annoying from the beginning, and Olivia Wilde....I'll stop there while I'm ahead. Point being, a film with so much potential turned out to be rather disappointing, but we can't blame Russell Ziskey for it.