One of the most well acclaimed physicists in recent time. His practice of theoretical physics is still popular in modern academia.
He’s best known for developing the theory of relativity. His theories of space, time, mass, motion, and gravity revolutionized the practice of physics. His scientific contributions helped change the approach to quantum mechanics and a scientific understanding of nature.
https://www.britannica.com/biography/Albert-Einstein
https://www.biography.com/scientists/albert-einstein