What can I add to a tank with an established Clownfish and Orchid Dottyback?

[jack.mid]

I have a Red Sea Max E-170 (34G Display) with a pretty well-established ORA Black Ocellaris Clownfish and an equally well-established ORA Orchid Dottyback. My clownfish is the boss of the tank and makes sure the Dotty knows it whenever she swims over to his side. I successfully kept a Yellow Clown Goby with both of them for about a year, but he mysteriously went missing one day. He was added when the clownfish was still a baby and wasn't so aggressive so I'm cautious about trying to add a similarly peaceful fish now.

I am wondering what my options are for trying to add another fish into this semi-aggressive tank? Damsel? Wrasse? Blenny?

Open to any suggestions

 

[blaxsun]

Azure damsel would be my first choice for a damsel, Midas blenny and Flame hawkfish. All of those get along great with my clownfish and dottyback.