Posted a WTB thread today for what ill be starting with in terms of plants (any seller reccomendations or offers if you have most of this would help)
Staurogyne repens around the tree (mostly in the back) surrounded by a carpet of glosso up top. Taller parts of the tree will have anubias nana petite tied to it and some moss (still not sure what will look best without going crazy) and then some HC to carpet down the hill. Might need to find an interesting low height wide plant (probably a crypt or normal anubias) to fill the cool pocket up front. I figure something to add some color but not so big that it'd overpower things.
I will probably also slope the hill high in the front right corner to create some more balance and keep it visually interesting.