Plenty of options!
What kind of cichlids were you interested in?
Convicts and eba are two good options.
Basically all of the dwarf cichlids are good for that size tank.
I wouldn’t really do rift lake cichlids, I tried and it didn’t work out. Tank is just too small.
Not sure about angels.
Puffers would make a good option. I have a group of 3 Amazon puffers in mine plus tetras, mollies, loaches, and a pleco. The lurkers would make a good solo fish.
One good solo fish is also a red wolf.