TP-Link WN722n v1 (atheros chip), make sure it is the first version not the new one as the new one doesn’t support monitoring mode. If you are planning for a small area ( range ) of attack as this is effective only in 10 meter range max, I guess.
For the more effective and larger range you can surely check out the Alfa WiFi Network Adapters. These give a bigger range of attack and can be extremely effective when carried out in public areas.