What is the best printer for Mac OS 10.15.7 and newer

The printer that is supported by Apple's AirPrint, because you are then independent of the printer vendor's decision to stop providing drivers/software in support of the device at some future timeframe. If not the first sentence, then a vendor that specifically offers 64-bit software/drivers for macOS Catalina or later.

As fellow users, we are not in the printer evaluation business, and the selection criteria for your new printer can be subjective to your budget, and device requirements.