He didn't just use a chainsaw.When you kill someone with a chainsaw...I'd call that a slash. Just saying.
And Gein was basically a cannibalistic serial killer, so...Leatherface operated with the help of his sadistic family. He was mentally ******ed, and would often sprint to chase his victims, grunting and screaming throughout.
If we're talking about the quiet, slow-moving stalking that has been a staple in horror films for years, that goes to Michael Myers. Leatherface came first, but even he drew inspiration from Ed Gein, who was inspiration for Norman Bates.
So basically, Norman rules all.