While Xavier University of Louisiana doesn't have the same prolific celebrity alumni list as some larger universities, it's important to note that its focus has historically been on producing highly successful professionals in STEM and other fields, rather than necessarily entertainers. There isn't a widely publicized list of famous actors or musicians who graduated from Xavier.
To find alumni who have achieved significant recognition in their fields, you'd be better served searching for Xavier University of Louisiana alumni who are prominent in science, medicine, law, or business. The university's website or alumni directory would be the best resource for this.