Aristotle is the one.
Aristotle, for me, is one of the most brilliant and overrated people in the world.
Overrated? When teachers asked something about who were the contributors in
Mathematics or Science or whatever subject he’s asking, Aristotle always comes
into your mind right? That's how smart Aristotle is. He’s like a robot that is trapped in a human body. He gave major contributions to everything we
are learning now in school. Plato, who was his professor, called him “the thinker” because of his
disciplined study habits. It was said that he was very studious and
very dedicated to what he was doing. He is a kind of person we should look up
to. He always disagree with Plato and created many postulates like humans have different kind of souls, the id and the ego, desire and reason, which relative to Psychology, and the his famous study that everything in life has a purpose. A student should not be afraid of what he think is right and prove it that it is worth arguing with or standing up for. Also, the reason why I like Aristotle because he gave so much contributions in the field of Psychology.
He made us believe that everything and everyone had a purpose and that purpose is that human should
think how to live to have a good life. The human entelechy (having a telos or aim or purpose inside) is rational activity in pursuit of the good. All my life, my perspective in life is like what Aristotle's belief and I believe I was created for a mission, a mission that I still don't what it is.
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You may also watch this video about Philosophy with Aristotle: