It's hard for me to choose. It's a tie between Order of the Phoenix, both parts of Deathly Hallows, and Crimes of Grindelwald, although my favorite character is unanimously Albus Dumbledore. Ollivander is a close second though. I love the Dumbledore family in general because they have a very noble position and they are reminiscent of the noble houses like the Starks (Albus = Ned) or Baratheons (Aberforth and Ariana = Robert and Lyanna) in ASoIaF. I'm torn if I like the Fantastic Beasts storyline more or not. I'm leaning towards yes, but I'm still conflicted because of some of the inconsistencies.