This is also a no..
Red Tail Shark
5 Pearl Gourami
5 Cockatoo Apisto
5 Blue Ram
Blue rams need warmer temps than the rest, above 82F for longterm best health. Too hot for the rest.
No apistos or rams with the shark either--all occupy the bottom of the tank so will cause disputes.
Obviously thinking you are set on a shark...
Here's something that could work better
6 pearl gourami
8-10 five-banded barbs
1 red tail shark
Keep the bottom shark only.
OR, if you like the look of the shark but want more bottom activity, look into botia loaches instead (not clowns--too big).
Could do:
6 pearl gourami
8-10 five-banded barbs
8 yoyo or zebra loaches
Five banded barbs look similar to tiger barbs, but a LOT more peaceful.