Well, I can speak from experience, I also have a Ryzen 5 3600. Case is a Phanteks P400A, so mesh front. 3 intake, and 3 exhaust fans.
When I had the stock cooler, I ran prime95 and it would reach over 95C, was at 50C/60C idle.
After I got an Arctic Freezer eSports 34 Duo, now on Prime95 it...