Thaddeus Romero Hoskins
Nemesis: Martian Manhunter
Other Major Foes: None
Appearances: 2 comics
Powers: Superior strength, energy-projecting gauntlets, and an army of headmen.
Assumed Earth was doomed. Made himself into a big ol' cyborg. Created spider-legged robots who murdered hobos and used their bodies as automatons. Built a space ark. Martian Manhunter trashed all of it in issue #1 of his ongoing series.
Lose: TOR (6-7); Weapons Master (5-8)
Other Major Foes: Superman Family, Vril Dox II
Appearances: 600+ original comics, decades of animated series, live action television, toys, video games and more.
Powers: Twelfth-level intelligence enabling a near limitless number of additional superhuman abilities.
I feel like the Headmaster could have done better against the Weapons Master, although that's definitely disputable. The Headmaster is a reasonably powerful guy whose standing in the Vile Menagerie bares improvement, but then again, Weapons Master did hold off a respectable JLI line-up. Hopefully I can get Headmaster a decent match eventually to notch a win. This won't be it. The Headmaster got beaten handily by the Martian Manhunter in his only story appearance, while Brainiac is one of the few Superman villains people like and respect. Crossovers have been built around the threat of Brainiac. Headmaster didn't even rate a story arc, nor multiple appearances, making him a lesser creation of the Ostrander/Mandrake run. He's simply outclassed in every way here.