I'll enlist down the top colleges for NEET PG -

1. Maulana Azad Medical College, New Delhi
2. Grant Memorial college, Mumbai
3. Seth GS Medical college, Mumbai
4. Bangalore Research centre, Bangalore
5. BJ Medical college, Pune.

The rank that you're asking about also depends upon the branch you need like gynaecology, anaesthesiology, etc. But the approx figure would be to score 100 and fewer ranks to get into these top colleges.

Kindly refer to the site below for more detailed information..

https://medicine.careers360.com/colleges/list-of-government-medical-colleges-in-india-accepting-neet-pg

Best wishes. Thank you.