Who is your favorite entrepreneur?

Just saw a question asking about who is your favorite founder. Based on that question, I am quite curious about who you admire the most as an already established entrepreneur. For me, I do greatly admire Elon Musk for his spirit of work. As a 51 years old man, to keep this level of busy schedule is quite unbelievable. A lot of my friends after 25 are seeking to settle down instead of working super hard:) What’s your opinion?