American Apparel's embattled Founder & CEO Dov Charney has finally gotten the boot. From reportedly showing up to meetings in his underwear and making sexually suggestive comments to female employees, Charney should have gotten the axe placed over his head a long time ago. As Mr. Charney likely sits at home cooking up a new retail concept, there are at least three other retail executives that could be shown the door soon. Aeropostale's CEO Thomas Johnson has overseen a business that is near financial ruin. Walmart U.S. President & CEO Bill Simon has a business that continues to post negative sales growth. Family Dollar CEO Howard Levine has just flat out struggled to deliver value for shareholders. TheStreet's Retail Contributor Brian Sozzi looks at three under-performing executives who could be pushed out.