It's difficult to name a single top model in Kolkata as there are many talented models who have made a name for themselves in the industry. However, here are a few notable models from Kolkata who are considered to be at the top of their game:

1. Sushmita Sen: Sushmita Sen is a well-known model and actress from Kolkata who won the Miss Universe title in 1994. She has since worked in the film industry and is considered one of the most successful actresses from Kolkata.

2. Bipasha Basu: Bipasha Basu is another well-known model and actress from Kolkata who started her career as a model and later ventured into acting. She has worked in a number of successful Bollywood films and is considered to be one of the top actresses in the industry.

3. Ushoshi Sengupta: Ushoshi Sengupta is a model and beauty pageant winner from Kolkata who won the title of Miss India Universe in 2010. She has since worked in the modelling industry and has also been involved in various social causes and initiatives.

4. Noyonika Chatterjee: Noyonika Chatterjee is a former model from Kolkata who has been credited with revolutionizing the Indian modelling industry in the 1990s. She has worked with several top designers and brands and has been a mentor to many aspiring models.

5. Kanishtha Dhankar: Kanishtha Dhankar is a model from Kolkata who won the title of Elite Model Look India in 2011. She has since worked with several top designers and brands and has also walked the ramp at international fashion shows.

These are just a few of the top models from Kolkata, and there are many others who have made a name for themselves in the industry.