Probably the closest fast growing plant I will be doing is Rotala. That plant usually grows like a weed for me even in low-tech. Besides that mostly Crypts, Java Ferns, Dwarf Sag, Water Wisteria, Amazon Swords, Banana plants, Moss balls etc.
I've just been eyeballing that thing for a while and wonder if it's the right way to go or not. I don't want algae issues though.