2. Narcissa/Hagrid
With him, she was able to see that the world wasn't completely cruel. She saw happiness, kindness, and loyalty woven together to show it truest form in the Gamekeeper, and such a childlike innocence that she had never truly witness before. Narcissa had used him selfishly to escape her pureblood world, and to see how beautiful the world was through his eyes. Around him she saw equality, love, and hope. Without him, she wouldn't have learned that the outside appearance can sometimes hide something beautiful. Without him she would've been as cold and closed-minded as Bellatrix.
So Narcissa thanks him with a kiss and uttering the words 'I love you.' Before exiting his life forever.