If you are looking for the best marketplace extension for magento 2 enterprise, you should reach this Magento 2 Marketplace Pro-EE. The extension supports Rest Api and can work in magento 2.3.x.
There is nothing like the best but the one that’s feasible should provide all required functionalities to make things work. You should check with Marketplace Multi-Vendor Module for Magento2.
Some additional plugins: