Which movie stepmother is the world's most wicked?

Queen Narissa in Enchanted (2007)

As the throne-hoarding queen of a far-off land, Susan Sarandon throws Amy Adams down a special space-time warp to keep her from marrying her stepson. Where does she send her? To a place "where there are no happily-ever-afters," also known as Times Square.
Lady Claudia Hoffman in Snow White: A Tale of Terror (1997)

Sigourney Weaver's Hoffman, a vain, possessive shrew, plots against her stepdaughter with the help of talking mirrors, poisoned fruit, and forest beasts. What starts as your average Dark Age rivalry quickly escalates, and it ends with clever Lily stabbing dear old Stepmom in the chest.