Many highly successful individuals in their fields are generally self-taught. Many famous people lack formal education or a formal degree in a relevant field. Here are some examples:

1. Steve Jobs (Apple Founder): Steve Jobs attended Reed College for a time but never finished college. Nevertheless, he founded Apple, which revolutionized the world of technology and design. He achieved success through his intuition, creativity, and vision, transcending his formal education.

2. Walt Disney (Disney Founder): Disney did not receive any formal art training after high school. He developed his own drawing skills and founded the Disney Empire, which revolutionized the world of animation and entertainment.

3. Soichiro Honda (Honda Founder): Honda did not receive any formal engineering training. Starting as a mechanic, he pursued his passion for engine technology and made his mark in the automotive world by founding the Honda Motor Company.

4. Elon Musk (Tesla, SpaceX Founder): Musk studied physics and economics at the University of Pennsylvania, but abandoned his doctorate to pursue technology. He achieved great success through self-taught learning in complex fields like rocket science and electric vehicles.

5. Jan Koum (Founder of WhatsApp): Koum, who came to the US from Ukraine as a poor immigrant, did not attend college. He taught himself how to code, developed WhatsApp, and sold it to Facebook for $19 billion. Despite the challenges, he achieved success through resilience and passion.

6. Brendan Eich (Creator of JavaScript): Eich developed JavaScript without a formal computer science education. He contributed to the programming world through self-taught learning and became known for Mozilla.

7. Larry Ellison (Founder of Oracle): Ellison did not complete college. However, he revolutionized the software world by founding Oracle, a database technology company. He achieved success through his self-taught learning and entrepreneurial spirit.

8. Jack Dorsey (Founder of Twitter and Square): Dorsey dropped out of college while studying at the University of Missouri and pursued technology. She pioneered social media and payment systems by founding innovative companies like Twitter and Square.

9. Michael Dell (Founder of Dell Technologies): Dell began studying medicine at the University of Texas, but dropped out after his freshman year to focus on computer sales. He founded his own company and created a giant brand in the technology sector.

10. Daniel Ek (Founder of Spotify): Ek dropped out after only eight weeks at the Royal Institute of Technology in Sweden. He self-taught and developed Spotify, becoming a leader in the music streaming industry.

11. Coco Chanel (Fashion Icon): Chanel did not receive formal fashion design training. She grew up in an orphanage and learned to sew. She developed her own style and founded the Chanel brand, which revolutionized the fashion world.

12. J.K. Rowling (Author): Rowling studied French at the University of Exeter but did not receive any formal training in writing. She broke new ground in world literature by writing the Harry Potter series through her own efforts.

13. Ingvar Kamprad (IKEA Founder): Kamprad received no formal business or design training. He entered business at an early age, founding IKEA and developing a revolutionary concept in the furniture industry.

You don't need a diploma to achieve great success. Many of the people mentioned here achieved this years ago, when access to information was much more difficult. In today's internet, technology, and information age, self-education, self-improvement, and self-starting are much easier.