Negan is arguably the villain who perpetrated The Walking Dead's most heartless acts, but he is far from the only foe who posed a challenge to Rick Grimes' good-natured band of survivors. Rick's former partner and best friend Shane turned on Rick early in the series, forcing Rick's hand, who ultimately killed him. Dawn Lerner proved to be an aggressive leader of a regimented group that kidnapped the young Beth right out from under Daryl's nose. Even when Rick orchestrated a peaceful trade of hostages, Dawn ended up killing Beth. Gareth was the leader of Terminus, a compound that Rick's gang originally thought would be their salvation. However, when it came to light that the camp was thriving as a result of cannibalism, Rick killed Gareth before he could eat them or anyone else.