Stardust the Super-Wizard
In the Collapsed Cosmos, Octobriana remembered having been part of a secret organisation devoted to fighting the Sixth Column, a cult which worshipped a “fascist god” known as Stardust the Super-Wizard. The organisation's superhero team, which included Octobriana, Jenny Everywhere, Trashman and more, managed to destroy Stardust at long last in a climactic battle in 1968, but Trashman was killed during the battle. (PROSE: The Hermetic Garbage of Jenny Everywhere)
One universe's version of Stardust was still viewed as a hero, although Dynamite Thor thought he was dangerously harmful. He was a member of the super-team known as the Super Besties. (PROSE: Open Sourcing)
Behind the scenes
Stardust was the main character of a fairly long-running 1940s comic book series, appearing in stories published by Fox Feature Syndicate between 1939 and 1941 (principally, but not only, in Fantastic Comics). Although nominally the hero, being evidently inspired by his contemporary Superman, Stardust has often been reimagined as a villainous figure in more recent uses of the character, as his stories often featured him using his powers to exact egregiously gratuitous “vengeance” on villains. The character is in the public domain, which is what gave rise to these reimaginings.