King Lear

Lear's oldest daughter Goneril is an evil woman who is willing to go to extremes to achieve her goals. She doesn’t let anything get in her way. Goneril pretends to love her father so he would give her a good portion of his kingdom. Right off the bat of the play portrays how she can be deceiving which sort of foreshadows her role in the play.
After gaining a large portion of her fathers land, she discarded Lear. She didn’t actually love her father, she just had a wanting for power. Her father was an annoyance to her. She banishes him and moves on like he never did anything for her. Her heartless cruelty becomes more and more apparent as the play progresses.
Goneril even plans to kill her own husband, the Duke of Albany as well as her sister Regan so she could be with Edmund. Goneril progresses to get what she wants through evil schemes and manipulation. She lies to her father for land, she lies to Albany to get a respected husband, and then she starts an affair with a bastard. Meanwhile, Lear is banished and going crazy. This cruelty and recklessness directly causes her death.
Goneril and Regan are personifications of evil because of their hunger for power. It is their hunger that drives them to do such foolish deeds. Ultimately, their poor embodiment of evil results in justfication, even though many innocent people are killing along the way such as Gloucester and Cordelia.