Keep only essential packages centos,Almalinux

In an attempt to learn more about Centos,Almalinux and its packages, I want to remove all non-essential packages, so I can install what I need, when I need them and know what they do.

When using commands like yum list installed or rpm -qa, I get a comprehensive list of all installed packages. However, it’s challenging to distinguish whether a package is crucial for the OS or not. I need a method to filter packages by their importance, so I can safely remove ones like MariaDB, Salt, Nginx, and similar packages that are not critical to the system’s core functions.