Some of the well-known and prominent brokers in India include Zerodha, ICICI Securities, HDFC Securities, Kotak Securities, Angel Broking, Sharekhan, and Axis Securities, among others. It is advisable to refer to up-to-date financial market reports, rankings, and other reliable sources for the latest information on India's largest broker, as the ranking may change due to market dynamics and factors such as acquisitions, mergers, and business performance.