creative [kriːˈeɪtɪv] n
one who is creative; especially : one involved in the creation of advertisements

director [dɪˈrɛktə daɪ-] n
(Performing Arts) (Communication Arts / Broadcasting) the person responsible for the artistic and technical aspects of making a film or television programme

editor [ˈɛdɪtə] n
a person who makes a selection and arrangement of individual shots in order to construct the flowing sequence of images for a film