There are many famous Sikhs who have made significant contributions in various fields. Here are some of them:

1. Guru Nanak Dev Ji: The founder of Sikhism, Guru Nanak Dev Ji is one of the most famous Sikhs in history.
2. Bhai Gurdas: Bhai Gurdas was a Sikh scholar and poet who made significant contributions to Sikh literature.
3. Maharaja Ranjit Singh: Maharaja Ranjit Singh was a Sikh ruler who established a powerful Sikh empire in northern India in the early 19th century.
4. Harbhajan Singh: Harbhajan Singh is a famous Indian cricketer who has represented India in many international matches.
5. Milkha Singh: Milkha Singh, also known as the Flying Sikh, was a famous Indian athlete who won numerous international medals in track and field.
6. Khushwant Singh: Khushwant Singh was a renowned Indian author, journalist, and historian who made significant contributions to Indian literature and journalism.
7. Gurbaksh Singh Khalsa: Gurbaksh Singh Khalsa was a human rights activist who went on a hunger strike to protest against the detention of Sikh political prisoners in India.
8. Daljit Singh Ahluwalia: Daljit Singh Ahluwalia is a famous Indian-American businessman and philanthropist who has made significant contributions to various charitable causes.
9. Amrinder Singh: Amrinder Singh is a famous Indian politician and former chief minister of Punjab.
10. Jasjit Singh Bunny: Jasjit Singh Bunny was a famous Indian comedian and actor who was known for his work in Punjabi films.

These are just a few examples of the many famous Sikhs who have made significant contributions in various fields. They have helped to promote Sikhism and Sikh values around the world and have served as role models for millions of people.