Well since you have angels you will need to have a peacefull community......
So
maybe some...
gouramis
cherry barbs (schooling fish)
clown loaches
swordtails
silver dollars(schooling fish)
danios(schooling fish)
plecos
tetras (might be eaten when angles grow up) (Schooling fish)
rainbow fish (schooling fish)
2 bala sharks (Due becuase they grow huge 12+ inches.(schooling fish)
platies
corydoras catfish
ghost shrimp
guppies (schooling fish)
red tail shark
Do not get tiger barbs or fish that like to nip.......
Hope that helped. (schooling fish) = you really should have 5 or more for them to be happy and comfortable.
But 2 balas should be OK. They like company but not too much..... IMO