My little fangirl heart is exploding with joy from reading this thread
Dumbledore might even have a Joie De Vivre, it is light on the outside and deeply insightful too. I am going to go with a fun but erotic deck for Sirius, like the Manara maybe? Minerva may have Fantastic Creatures by Lisa Hunt. Luna Lovegood might also have a copy of the Fairy Tale Tarot by Lisa Hunt. Lily Evans might have possessed the Victorian Romantic or Tarot of Delphi. James Potter, if he had free time after pursuing Lily, Quidditch/pranking and classes (in that order) would most likely be an oracles kind of guy. I don't really see him with a tarot deck. An oracle with a fun, but clearly masculine vibes and definitely something old-world.
Draco Malfoy would have something limited edition with gold trim, ostentatious imagery. A deck with mixed leanings just like himself. Like maybe an ultra luxurious Bohemian Gothic or Mary-el. Hermione Granger in addition to RWS and Thoth would probably just for reference read up a lot of Robert Place reading material and perhaps have one Alchemical Tarot deck of his too. The history and symbolism definitely is a Hermione thing.
The Hermit from Vampire Tarot by R.M. Place reminds me of Voldemort a lot. Oh yeah, and Ludy Lescot for Bellatrix. Molly would definitely have a Housewives Tarot.
Who might own the Cosmic Tarot? And, Phantasmagoric Theater tarot?