Olive we haven't written together much but I'd be honored to one day~
Err I can offer Marion Flourish who is new and needs either friends or enemies from schooldays. Think she and November would be peers
For your society types I have Nel Lestrange's until-now-thought-dead sister, former cat Diana Selwyn. If nothing else she's a riot at parties and pretending she enjoys being divorced
For misc WC need and occassional hurls-that-shouldn't-happen, I offer Thomas Harvey who people hire for bartending needs at parties OR as a private investigator. ...he has range?
If you need a law enforcement cop type Cassian Valenduris can be nice to look at