I know that Gracie Watson is considered the most famous marker in Bonaventure Cemetery, but the Taliaferro (pronounced Tolliver) Angel is likely my favorite. It catches the best light in Bonaventure.
Marie Barclay Taliaferro (1858-1893) is the daughter of Margaret Marshall and Adalbert Barclay and the granddaughter of Mary and Colonel James Marshall of Marshall House fame. She died at a young age, much like her mother did. Four of her children rest next to her as they did not make it out of infancy/early childhood. If you visit Bonaventure, make sure you visit right when it opens to get the best light.