Cant believe I kept missing this post, sorry for the somewhat late reply but here’s my answer :)
You can absolutely hold a few more wrasses, you should be alright with more boisterous Cirrhilabrus like lubbocki, naokoae, and condei. I wouldn’t personally do any Paracheilinus species however Halichoeres, Macropharyngodon, Xenojulis, and smaller Anampses should be fine. I would personally go for one or two of these (potentially even 3);
Anampses melanurus
Anampses lineatus
Cirrhilabrus bathyphilus
Cirrhilabrus efatensis
Cirrhilabrus nahackyi
Cirrhilabrus lubbocki (Indo var.)
Cirrhilabrus naokoae
Cirrhilabrus rhomboidalis
Cirrhilabrus rubriventralis
Cirrhilabrus africanus
Cirrhilabrus hygroxerus
Halichoeres cosmetus
Halichoeres biocellatus
Halichoeres rubricephalus
Halichoeres argus
Halichoeres leucoxanthus
Halichoeres iridis
Halichoeres pelicieri
Halichoeres marginatus
Halichoeres leucurus
Macropharyngodon bipartitus
Macropharyngodon ornatus
Macropharyngodon negrosensis
Macropharyngodon meleagris
Macropharyngodon viviennae
Macropharyngodon kuiteri
Xenojulis margaritaceus