Multifarious addition ideas.

I am looking for ideas for my vanilla based Multifarious mod, its going to be for 1.12.2, 1.14.4, 1.15.2, and 1.16.5, I would really like some ideas that fit vanilla minecraft as it is, here is the current set of features:

-Variant Bookshelves

-Brick Variants

-Brick Stair Variants

-Aletris Flower

-Onion

-Rose Flower

-Lavender Flower

-Ispary Flower

-Osteospermum Flower

-Osteospermum Bush

Any idea is helpful, thanks if you do give any!