well, your looking at the usual mate.
Anubias
Java fern
Bolbitis
Mosses
you might get away with:
Echinodorus
Vallis
Crypts.
but those three like some ferts. if you can get some easy carbo and TPN+ they will thank you for it. shrimp will be fine as long as you dont triple dose or anything silly!
if you dont want to do that, get yourself a nutritious substrate. JBL aquabasis is cheap as chips and is the best substrate i have used! it was really good and im wishing i used it in my 4x2x2. EC has been terrible. JBL will need capping though, either some small grina gravel or perhaps some akadama... (DRL of course)
JBL manado is their new 'ish' substrate. but its really light and gets blown about quite alot. whilst it will hold the plants your after, finer things like stems just lift out of it.