The worst of the Goa'uld in the Stargate franchise were the System Lords, and there certainly were a lot of them. These villainous leaders were technically immortal, so they went on enslaving humanity for centuries, posing as gods to gain access to as many soldiers and hosts as they could ever need. The first of these System Lords, Ra, was introduced in the 1994 movie Stargate, but it was ultimately revealed that dozens were even worse.

https://screenrant.com/stargate-sg1-system-lords-what-happened/