Tiger Hart

Golden Age Origin
Tiger Hart of Crossbone Castle is a dual sword-wielding pseudo-medieval warrior who battles against lawbreakers on the planet Saturn. In his one known exploit he fought to recover Queen Hilda and the Solinoor Diamond from Turk-the-Terrible and his Talon Man. He shattered the diamond with his sword so that no one would ever kill for it again. Tiger Hart is fairly brutal. He tortures two of Turk-The-Terrible's men by hanging them up over a pit of tigers and threatening to cut them loose.

Golden Age Appearances
Planet Comics #2