Doubtful that most Catholics will note who the Doctors of the Church are among the saints, but perhaps we ought to attend to the small group much more than we do. Today, St. Gregory of Narek is liturgically remembered by the Church. Gregory is revered as a saint, a man who served as a priest, gifted by the Spirit as a mystic, and shared his talents as a composer, astronomer, theologian and poet; he is honored as the first poet of Armenia and revered by Armenians as a “watchful angel in human form.” He is also the 36th Doctor of the Church and, one of very small group of Eastern Fathers with the title.
Matthew Bunson wrote a good biography of St Gregory of Narek that will give you a wider perspective.