The following infographic identifies six types of leaders: Authoritative, Affiliative, Democratic, Coaching, Pacesetting, and Coercive. The first four are good archetypes, and the latter two … not as much. Which reigns supreme? According to Harvard Business Review research, authoritative leaders — those who “mobilize people toward a vision” — boast the strongest correlation with a positive work environment. However, HBR notes that the best leaders become adept in a variety of different leadership styles.