I really like your branches and especially how you arranged them. I think an HC carpet would look great. For us to give plant recommendations, can you tell us what kind of look you are going for? Do you want to keep the back of the tank exposed, as it is now?
Also, just from experience, Having branches in your tank is a PITA when you have to scrape the glass and are unable to do so because the branches are blocking the way. Hopefully you never get algae on the glass.
Looking forward to seeing how this turns out!