What type of other fish would be best for my tank?

[Jared]

I have 4 silver dollar typed tetras, 2 angle fish, a pictus catfish, and a huge 7 inch weird type of catfish.
I have 4 silver dollar typed tetras, 2 angle fish, a pictus catfish, and a huge 7 inch weird type of catfish. Its a 30 gallon tank.
I have 4 silver dollar typed tetras, 2 angle fish, a pictus catfish, and a 7 inch weird type of catfish that has a very tall dorsal fin and has the colors of a plecausomus. Its a 30 gallon tank.

 

[Irish]

The angel fish tend to get big so I wouldn't add anything to the tank.

 

[pleccy]

How big is your tank?

 

[Parachromis]

Actual TRUE Pictus catfish are best kept in at least three (they are loose shoaling fish,but very social) ... other than that the entire answer hinges on how big the tank is and which "huge 7 inch weird type of catfish." you have.