No single "best" exists, but here's the current landscape by what you're looking for:
| You Want... | Play This |
|---|---|
| Immersive single-player RPG | Hogwarts Legacy |
| Mobile MMO with cards/social | Magic Awakened |
| Story choices + Hogwarts life | Hogwarts Mystery (tolerate energy/micro) |
| Couch co-op with kids | LEGO Harry Potter |
| Competitive Quidditch | Quidditch Champions |
Warning: Mobile HP games aggressive monetization. Set spending limits!