Law
Education
Childcare
Fashion designer
Actor
Model
The Slacker career (I loved that in Sims 1/2)
Dancer
Music Execs
Talent Management
Reality star (Just because I think that'd be interesting, it could branch off from the social media career, maybe? And if they put the celebrity system back into affect, it could come with interesting perks/disadvantages)
Entertainment Host (Maybe a television career track - where you can choose to be in front of the cameras or behind them)
I would love to see something in live theater? Like Broadway actress, playwright, composer, etc.
Singer! They have the singing skill, so I don't see why it's not a career.