dont you think you have A LOT of bottom dwellers already? Why not go with some more mid/top.
Looking @ your list...
1 Bala Shark (Balantiocheilus melanopterus)6.5-7"
1 Rainbow Shark (Epalzeorhynchos frenatus) 5-6"
1 Albino Rainbow Shark (Epalzeorhynchos frenatus)4-5"
1 Cuvier Bichir (Polypterus senegalus) 4-5"
1 Gold Algae Eater (Gyrinocheilos aymonieri) 4"
1 hifin spotted pleco (Baryancistrus demantoides) 10-11"
1 clown pleco (P. maccus) 3"
Every fish except the bala chills at the bottom. It's even that you recommended that rainbow sharks are kept alone, not to be mixed with redtailblacksharks either but there are exceptions and your tank is probably one.
IDK, I know the Bala gets too big for your tank but you could go with 3 more balas, hopefully you're planning on moving your bala to a 150G + tank. Those things are so active and yours is only half grown? o_0