I have seen very few indian films, but these would be the 10 best:

1. Uttara (Buddhadev Dasgupta)
2. Aparajito (Satyajit Ray)
3. Charachar (Buddhadev Dasgupta)
4. Sant Tukaram (Vishnupant Govind Damle, Sheikh Fattelal)
5. Pather Panchali (Satyajit Ray)
6. Subarnarekha (Ritwik Ghatak)
7. Kaalpurush (Buddhadev Dasgupta)
8. Piravi (Shaji Neelakantan Karun)
9. Mahanagar (Satyajit Ray)
10. Jukti, Takko Aar Gappo (Ritwik Ghatak)