Exhaust rattle/buzzing

At certain rpms I have some really annoying vibration noises from my exhaust. I’ve replaced all the spring and rubber mounts, they seem tight and secure. I even added a small rubber isolator to the midpipe pad that meets the frame.
The exhaust heat shields seem tight but is it OK to just remove them?

This is driving me nuts, we had it at the lake last weekend and it was embarrassing.