In aromatherapy, which oils are the stars, which are the supporting players,?

[Damien]

and which are the interesting extras?
Personal biases are welcome.
Personal biases are welcome.
Personal biases are welcome.
Personal biases are welcome.
Opps.
Actually the dozen others would be great! I was thinking in terms of what are the most important first dozen for anyone to have, then maybe which ones would round out a collection or first aid kit. I have liked and used essential oils in the bath and in a burner since 1989, but I wonder sometimes which ones get the most practical application, or perhaps which ones people "wouldn't be without".