I don't know how good the airflow is on those cases... Just from looking at pictures, they look pretty restrictive. Have you ever tried running with the case open?
What kind of benchmarking were you doing when it hit 95C? Is your CPU overclocked? My i9-9900K@5GHz tops out at around 81C when running Prime95 using a Noctua NH-D15S, but I delidded my CPU.
Please give my Z370-G EFI folder a try. Link is below in my signature. I use Clover to inject kexts, so if you have any Hackintosh kexts in /Library/Extensions/ please delete them before booting with my EFI.