Check out some of the Bruins-Canadiens bench clearers from the early 1970s. They were fantastic. I was going to give you a link, but YouTube is down right now.
Probably 1 out of every 100 bench clearers had some real exciting fighting in them, I can remember a few. The other 99 though were 10 minute of 40 guys paired off and mostly not fighting, usually talking about a good place to go eat after the game.