If you want a serious suggestion I'd go either for St Hilda of Whitby who in 649 became Abbess of Whitby, a double house of monks and nuns over which she ruled wisely for 22 years. Or, given your interest in music, Hildegarde of Bingen, she is a Doctor of the Church, a very learned and wise woman, a philosopher, mystic and distinguished composer. She also wrote botanical works and medicinal texts and supervised exquisite miniature illuminations. Right up your street, I would say.