Others to check out:
Khabi Khabi - Classic 80's film not to be confused with the more recent Khabi Khushi Khabie Gham

Anything by Raj Kapoor, a film star from the 50s who drew heavily from Charley Chaplin. Shri 420 may be his most popular film and is indeed a good place to start. The songs from this film will stay with you for days. Awara is also a worth your time.

native son