just so we have a starting point, let's begin with a ranking of the best mani ratnam films. here's my list -

1. Nayagan
2. Iruvar
3. Agni Natchathiram
4. Mouna Ragam
5. Dalapathi
6. Kannathil Mutthamittal
7. Roja
8. Thiruda Thiruda
9. Ayudha Ezhuthu
10. Anjali