Based on my experience, I believed that Magento 2 Marketplace seller badge system by Landofcoder is the best for your needs. On the front-end, you can view the badge under the tab “seller profile”. The badge is awarded by the admin based on the seller's performance and it encourages the seller as well. It also attracts the customers about your product.
According me, Magento 2 Marketplace Seller Badge System by Landofcoder is the perfect choice for you. With this extension, you can set badges for different sellers basing on their performance and display it on the seller profile page. Also, you can manage the seller page.