Which F1 driver, known for his aggressive driving style and flamboyant personality, achieved a world championship after overcoming numerous challenges and controversies?

1. He famously clashed with his teammate during his championship-winning season.
2. His career included stints with multiple top teams, showcasing his adaptability.
3. He is renowned for his overtaking skills and never-give-up attitude.
4. His post-F1 career has involved various motorsport ventures and public appearances.