My group is only getting near the end of HotDQ, so I have very little to base my vote on... except I own most of the AP and have at least browsed them.
Curse of Strahd 15
Hoard of the Dragon Queen 11 interesting idea, but rushed to market - my group hated, I mean HATED the caravan
Out of the Abyss 15 shouldn't be the 1st to go
Princes of the Apocalypse 22
Rise of Tiamat 19
Storm King's Thunder 16
Tales from the Yawning Portal 22 more books like this please
Tomb of Annihilation 17