Schultz, Brown, Probert, Wilson, Semenko, Gillies, are guys I think of that when a scrum would start and a bigger guy would grab say, Bobby Clarke
, Schultz or Wilson would be right in there grabbing the guy and teaching him a lesson.
Probert with Yzerman, Semenko with Gretzky, Gillies with Bossy, etc etc.
If you mess with the little guys, those guys would be right there to make you regret your decision. They were the guys that would go after anyone, bully if they had to, but sent the message that their team was not one with which you'd want to get out of line.
Brown was, to me, one of the scariest enforcers of all time, a 6'5 lefty with a mean streak that never ended, if he was coming after you, you were in trouble and you knew it. I think he made quite a few guys piss their pants.