I am looking for examples of how the women in Poe's stories or poems have changed the narrators by their influence.
"Annabel Lee"--In this well-known Poe poem, the narrator is so overcome with grief for his lost Annabel Lee that he wants to or possibly even does sleep next to her grave. He has lost his desire to live and longs only to join his lost love.
"The Raven"--Similar in theme to the previously mentioned poem, "The Raven" features a narrator who misses his lost Lenore so much that he has become a recluse who sits in his chamber overwrought with grief. Poe does not make it clear whether the raven is real or a hallucination, but nonetheless, the bird represents the narrator's grief over and longing for Lenore, and it eventually causes the narrator to lose his sanity and wish for his death to reunite himself with his Lenore.
"The Fall of the House of Usher"--As the narrator becomes more embroiled in Roderick Usher's strange situation with his sister and her burial, he begins to hear haunting sounds from Madeline's final "resting" place. Ultimately, after Madeline returns from her premature burial, attacks Roderick, and dies, the narrator finds himself fleeing the collapsing Usher estate with only his life in tact, because Madeline and her brother in their insanity have cost him part of his own sanity.
See also "The Black Cat" (the wife's attempt to keep her husband, the narrator, from killing the cat), "Ligeia" (another Poe story about the death of a beautiful woman), and "Berenice."