I would either go with a SE asian, with ferns, mosses, crypts, and hygros.
Or African, with Bolbitus, and anubias.
I have an asian theme in my 6 gallon, it houses cherry shrimps, boraras spp. as the fauna, and for flora, I have C. wendtii 'green', H. sp. bold, and H. sp. 'lowgrow'. I'm thinking about aking the bold out tho, unless I can find a good spot for it.
65 gallon low tech planted