I came across an article and here are a few I have not seen tried YET. The article was about what can be grown in a hydro unit. Now I do not know if it can be done in an AG but thee are Kratky, totes etc.
Celery The fastest way to grow celery at home is to use the base of the last bunch you had from the grocery store. Simply place the celery on a plate of room temperature water until you see new growth from the roots, and then you can transplant it into your hydro system – even if that just means placing it into a tall glass which can support the celery as it grows.
Kale has been farmed hydroponically for years. The crop grows relatively quickly, and will happily regrow if you only harvest a couple of leaves at a time.
Spring Onions you can use the ends of a shop-bought onion and place it in a glass to allow for regrowth, or you can start them from bulbs. The bulbs and roots will sit down in the water, whilst the leafy green stems will rise upward: this makes it possible to grow a lot in a small amount of space.