What position can we give to this amazing organizer?

My roommates and i are starting a music company. we are a bunch of artists that aren’t too familiar with the logistics of marketing and what not. our close friend Meg has helped us with everything from marketing strategies to branding and even designing logos. She is our go to person for everything. but we need to give her a solid job description any ideas?

all we have is our go-to person, which doesn’t sound too professional