Who are the major figures in Sikhism?

The major prophets in Sikhism (also known as the 10 Gurus) are called:

1. Sri Guru Nanak Dev Ji
2. Sri Guru Angad Dev Ji
3. Sri Guru Amar Das Ji
4. Sri Guru Ram Das Ji
5. Sri Guru Arjun Dev Ji
6. Sri Guru Har Gobind Ji
7. Sri Guru Har Krishan Ji
8. Sri Guru Har Rai Ji
9. Sri Guru Tegh Bahadur Ji
10. Sri Guru Gobind Singh Ji

The 'Sri' and 'Ji' are signs of respect.