Final answer:
Alex is best described as a servant leader, characterized by his focus on serving others and fostering both personal and organizational growth.
Step-by-step explanation:
Alex displays characteristics not of an authoritarian, transactional, or merely charismatic leader, but rather those of a servant leader. This type of leadership is distinguished by its focus on serving others - both within the organization and in the wider community. Servant leaders prioritize the growth and well-being of their employees and the communities to which they belong, often involving themselves in personal development and contributing to societal goals. Characteristics of a servant leader include the desire to serve others, a commitment to the personal and professional development of their team, and an ethical approach to management that benefits both the organization and the external community.