I ranked 19672 GMR and 1592 in OBC b category in WBJEE 2021. Will i gat good govt college?

Congratulations of your number.
I think you good best privet colleges and you can try for government college.

Some college as per your rank

Heritage Institute of Technology, Kolkata

Kalyani Government Engineering College, Nadia

IEM Kolkata - Institute of Engineering and Management

Jalpaiguri Government Engineering College, Jalpaiguri

GCETTB Berhampore - Government College of Engineering and Textile Technology

NIT Kolkata - Narula Institute of Technology

Government College of Engineering Textile Technology, Serampore

Government College of Engineering and Leather Technology, Kolkata

JIS College of Engineering, Nadia

Hooghly Engineering and Technology College, Hooghly

Bengal College of Engineering, Durgapur

You can also see all west bengal WB jee accepted colleges and also there fees , cutoff , seats, and also you can visit the college website for admission purpose from this link

https://engineering.careers360.com/colleges/list-of-engineering-colleges-in-india-accepting-wbjee

Thank you. I hope this answer helps you.