We are seeking for the ideal wallet to offer to our users/customers/sellers. What browser-based wallet is recommended to integrate in a Tesoz nft marketplace?
You don't need to pick a single wallet. You can use a a third party service called Beacon (https://www.walletbeacon.io/) to allow your users to choose which wallet they want to use, with your marketplace. Every user can use a different wallet and your app doesn't need to know or care about any of it.
If you are looking to recommend a wallet to users who might be new to the ecosystem. I work for Kukai, who have just launched Kukai 2.0 web wallet. One of the major features is a revamped NFT display, thats getting a lot of positive feedback. You can check it out here: https://wallet.kukai.app/
Why not Temple Wallet - https://templewallet.com/
I think it is a legit wallet.