I could recommend you beyerdynamics MMX 300, however the price might be the turning point for you. But getting them in a good B-sale is totally worth it in my opinion.
Edit: You can combine them with an Equalizer Software by downloading the wave file for the MMX 300 and applying it. I forget the name though. Something Something APO? They have a GitHub page if I am not mistaken.
A court room with stale air and only him with his mask on. Surely, what could go wrong? I see no risks at all.
Just let him join remotely. What is the big deal here?