Evil Dead II: Dead By Dawn (1986)
was the proper bridging of the gap between the horror that was the first movie and the comedy that was Army of Darkness (1992)
, in that it combined both horror and comedy so perfectly that no other movie in film history comes close to it.
The laughing deer head, for example...
...was equal parts funny as it was horrifying, and fit in to the scene so well, along with the laughing furniture, books, lamps, etc. which all led to Ash laughing insanely himself, which was meant to illustrate that he was beginning to lose his mind over all the evil stuff going on around him. I mean really, who wouldn't go crazy at stuff like this?
I honestly can't think of any other movie ever made that was able to pull off the horror-comedy bit as well as this movie did.