Final answer:
Flannery O'Connor was one of the most popular Southern writers after 1945, widely known for her short story 'A Good Man Is Hard to Find.'
Step-by-step explanation:
During the post-1945 era, several influential Southern writers emerged who have left an indelible mark on American literature. One of the most popular writers during this time was Flannery O'Connor, known for her sharp and profound short stories.
O'Connor's work has become a staple of American literature, with her stories like "A Good Man Is Hard to Find" (1955) being widely anthologized and recognized for their literary excellence. In the context of Southern Renaissance literature, which ranged from the 1920s to well after 1945, O'Connor stands out among her contemporaries who contributed to this rich period in the literary canon.