Nobody wanted to get hit by Cliff Harris.
Randy White's nickname was the Manster for a reason.
Harvey "Too Mean" Martin? You can say that when it comes to rule changes to protect the quarterback, he was the inspiration.
Mean Gene "the Hitting Machine", the nickname given to Eugene Lockhart, was earned by his punishing hits. He became the first rookie in Cowboys history to start at MLB as a rookie. in 6 out of 7 seasons he had over a hundred tackles. In 1989 he set a new club record and led the NFL in tackles with 222 including 154 solo tackles.
Roy Williams was also the inspiration for rule changes. He brought the wood.