Sigils are great and all, but there have been times that one or more of the Powers of Hell (from the Demons list on JoS) have guided me to artwork representing them. There is even artwork on the JoS Demons List, for some demons, like Agares and Marchosias.
Here is one website put up by a spiritual Satanist:
https://astralartsofthegods.weebly.com/
There are many talented, skilled artists that do artwork of the gods like Zeus, Apollo, Hades, Aphrodite, Loki, Odin, the Morrigan (who is Flauros), etc. I do not know if they are spiritual Satanists. I used to know someone who did artwork of the gods of Hell and he was a 11 years dedicated SS. He wanted to make it big in the artworld, promoting the gods but for his safety he kept that he was an SS to himself, and told no one but a few who were also SS.
He once painted a beautiful portrait of Satan (from the neck up) but I don't have this anymore. I had saved it and bookmarked it on my old computer.
If there were only sigils and not artwork, the gods would not be promoted properly and far and wide.
People would continue to believe that the Demons of Hell were as depicted in Hollywood movies and media, which is run by Jews and their lackeys.
We need more spiritual Satanists who work in Hollywood, screenwriters and actors, authors and artists, to promote positive, true, beautiful, positive and uplifting depictions of the Powers of Hell.