Who was the bad guy on A Nightmare on Elm Street?

The main characters in the original Nightmare on Elm Street (1984) are:

Nancy Thompson played by Heather Langenkamp

Freddy Kruger played by Robert Englund

Glen Lantz played by Johnny Depp

Rod Lane played by Jsu Garcia

Tina Grey played by Amanda Wyss

Lt. Thompson (Nancy's dad) played by John Saxon

Marge Thompson (Nancy's mom) played by Ronee Blakley