As an australian actor/singer and teacher...would an E3 work for me and could an agency act as an employer in that case?
E-3 visas are available only for those jobs that demonstrably require a bachelor's degree in the field of work you will be performing. We recently provided assistance in an E-3 visa for a Shakespearean actor and teacher who was coming to teach acting classes in USA. He would probably not have qualified as an artist under E-3 visa, because to be an actor, a bachelor's degree in performing arts is usually not required. But as a teacher, a bachelor's degree was indeed required.