hey fishfoot man!!! 1st of all welcome to MFK!! and by the way... NICE TANK!
love how u aquascaped it!
anyway man, we just talk abt 2 days ago? lol im jayson from nature

ur idea is fine with some SA cichs, bunch of diff kinds of geos and some big colorful barbs to roam the top..
anyway hers my suggestion,
top: african butterfly, red tail chalceus, apollo shark or denisoni barbs
mid: ur choice of SA cichlids, gold sevs, green sevs, jd, oscar, texas, managuense and whatever else u can get ahold on to.
bottom: diff kind of GEOS (now that would be cool!!), polypterus, school of loaches(i know u already have) or maybe some oddballs like dwarf rainbow snakeheads??? (we just got them)
anyway man, see yah around. i hear the angels stay? they'll be ok!