Sokar

"Of all the gods he picked to impersonate, he chose the Devil."

- Daniel Jackson

Sokar was a powerful Goa'uld System Lord, also well known for his cruel and sadistic nature.

Background information
When the Goa'uld first arrived on Earth, he became the basis for various underworld demons, including the Biblical Satan. During that period, Sokar held an Unas host, though he eventually moved to a human one. For a time, Sokar was ruler of the Goa'uld, until an alliance consisting of several other System Lords, including Ra, Apophis, and Cronus, banded together to defeat Sokar. He was believed destroyed, but somehow survived. He conquered the world of Delmak, making it his homeworld, and terraformed its moon into a hell-like world, naming it Netu. His underling Bynarr ruled Ne'tu, traveling to Delmak by way of Rings to inform Sokar of the suffering of the damned.

1999
In 1999, he made his presence known again among the System Lords, by making Apophis a prisoner on Netu, as well as engaging in a war with Heru'ur. Within a year, however, he was prepared to launch a massive attack against the System Lords, which would have put him in control of the Goa'uld Empire. Realizing how dangerous that would be, the Tok'ra destroyed Netu while Sokar attempted to put down a rebellion begun by Apophis when SG-1 arrived attempting to rescue Jacob Carter. Sokar was killed when his ship was caught in Netu's explosion, but Apophis escaped and took control of his forces.

Personality
Aside from the standard Goa'uld traits of arrogance and egotism, Sokar was made infamous for his sadism and cruelty, which were greater than just about any other Goa'uld. Sokar apparently had a fair sense of the Tau'ri's version of Hell, and so, he formed his prison world inspired by it, by bombarding the moon from orbit to crack the mantle and alow magma to seep to the surface and turn the sky red. He also was shown to have a militaristic viewpoint on a lot of topics, preferring to dominate via his army. Sokar was also shown to always have a flame around his hand, and he spoke in a twisted manner.