This tank sounds like a fun mix of biodiversity, I'm excited to watch you set it up and introduce the various species, thanks for sharing your plans and progress.
The success or failure of this stocking plan is going to depend on the numbers of each species, and how they are introduced. The N. brichardi/Eretmodus combination may or may not work, depending on the individual fishes. I certainly would not want to introduce Eretmodus into a 48" tank that already contained a bonded N. brichardi pair.
Sir Kieth thanks for the tip on the Bentos, they were a hard MAYBE, needing more research.
I am also not set on the daffodils, might switch those up, we'll see.
probably cyprichromis leptsoma, of some sort- depends on availability