My son-in-law’s is the scene where “Mad Eye” turned Draco into a ferret and terrorized him.
Book 7, when the gang is in their hidey-hole room and they’ve captured the Goblin from the bank (damned if I can’t remember his name right now). They lay out their entire plan to break into Gringotts. Once the explain everything he comments to them “So young to be fighting so many.” That quote killed me as I was reading and it always stuck with me.
When Dumbledore confesses he cares for Harry and cries. I think that made me cry when I read it.