It's Aristotle. Born in 384 BC, Aristotle was a Greek philosopher. He is noted for being the founder of the Peripatetic and Lyceum schools of philosophy. He was taught by Plato and is known as the "Father of Western Philosophy."
Aristotle was versatile, writing on many different subjects including poetry, music, and government. He is known for influencing almost all modern philosophers. While not all survived, he has many pieces of work including Nicomachean Ethics, On the Soul, and On the Heavens. His standout ideals include the theory of soul and virtue ethics.