Pretty solid actor and producer too. I don't think anyone has a more impressive catalog of comedy movies, Caddy Shack, Animal House and Ground Hog Day alone is a pretty stout trilogy.
I think Mel Brooks more than matches Harold Ramis.
However, that's not to say Ramis is chopped liver -- far from it. His movies always were relateable. You either feel the same as the characters, or you know someone who is just like one of them.
Caddyshack was the first movie I bought when I got my VCR in 1983. I paid $899 for the VCR -- a top-loader made by JVC with oversized buttons and a remote that used a cord, and it was top-of-the-line at the time. Caddyshack cost me $99 AFTER I had to buy a $50 membership at a video store.