First things missing I see are:
- heavy DOT builds
- Adramelech fire rush
- wizard with ballista / towers
- conjuration-heavy warlock (goblin builder and construction yard)
- tank dwarf
- necro ichthellids / sacrificial altar / growing ravenous ghoul
- wall of thorn push (is more a move bit maybe fits here if it is a core-idea of a book)
- all flying / all ethereal
- necro poison / tainted
- and of course the not working dragonbook and the also not working gate to hell book
I feel like some books are more depending on some synergies, others are build around single cards and some are more flexible around a Playstlye. And most mix them.
All i all I like the idea of collecting well known metas.