Just saw this thread...
Haven't seen this plant for sale for years now. Used to have tons of it and now in my tanks long gone, Ludwigia Repen x L. Arcuata
The only pic I saw with it in it from my albums.
Great color and almost no issues ever with light or ferts. Obviously it likes some ferts. On the left side, not the fake green and pink plant on the right, hahaha. Though it lasted for YEARS no need for light or ferts!
Moss balls (mabe not under rated, but over looked /not purchased by many.
Subwassertang !!! Also should be Susswassertang according to the Germans in an article I read.
Another one - Aponogeton, Boivinianus and a couple others you get in the bulb packs from the store - the ones which do not require high light
Another one I really enjoy in a tall tank is Crypyocoryne Balansae the long crinkled edge ones (often come in the tissue culture packs as little 1-2" plants.)
and the pic made me include Bolbitis - the mass in the center on top of the wood.