Fish suggestions for 50g

[ZzyzxRiver]

current stock list:
2 percula clownfish
1 blackcap bass
1 royal gramma
1 sixline wrasse
1 engineer goby
1 starry blenny

I’d like to add one or two more fish. If they perform algae eating or other services that’s welcome, but I also want bright and beautiful fish.

Tank is coming up on its first birthday. Here is the current scape.

 

[lapin]

7 fish in 50g is 8 gallons per fish, without factoring in rock. You are pretty full.

 

[Uncle99]

Yellow tang!
That meets all your criteria.