7 - Angie Russell. Angie flirted with student Nick Smith, and then blackmailed him and charged him with sexual assault. She also destroyed the Sutherland family when she revealed that her son Dylan was Rhy's father.
2 - Sarah Lewis. Sarah Lewis was the catalyst for the beginning of the Summer Bay stalker. High on drugs, Sarah was convinced the residents of the Bay were the ones who had killed her boyfriend, taking them hostage, she shot Noah Lawson before pulling the gun on herself.
1 - Eve Jacobsen/Zoe McCallister/The Summer Bay Stalker. In one of the shows biggest mysteries over the past 30 years, Eve stalked the residents of the Bay for two years! She acted on revenge for the loss of her lover Sarah Lewis, taking down plans, exploding buildings, swapping paternity tests and breaking up families, Eve/Zoe deserves the #1 spot on our list.