cPanel Resource Usage Tuning

I'm deeply focused on optimizing our cPanel server for peak resource usage and overall server performance. We're consistently seeing persistent high load averages even after extensive tuning of Apache, PHP-FPM, MariaDB, and LVE limits. I'm seeking deeper insights into specific kernel parameters or cPanel internal configuration settings that could help achieve truly stable resource usage without resorting to over-provisioning hardware. Help a brother out please...