The largest assemblage of superheroes in the Multiverse is probably Earth-Two's All-Star Squadron, even larger than Earth-One's 30th century Legion of Super-Heroes. Operating in the 1940's, during the period of World War II when protectors of freedom were necessary, this group included such teams as the Justice Society of America and Law's Legionnaires. A variety of costumed crusaders from diverse backgrounds possessing different abilities meshed into a cohesive unit of mystery men.
While Earth-S never had opportunity to bring together its various superheroes, they nevertheless existed and were brought together as smaller units, such as the Squadron of Justice, Crime Crusaders Club and Marvel Family. Still, most of these vigilantes worked solo without interacting with fellow masked men. Sharing similar careers, abilities, fashion sense and other aspects with their cosmic twins, these second-stringers in the Fawcett staple of characters nevertheless earned a degree of respect among their more prominent peers. There the bright boys, monstrous manhunters, deviced dogooders, backword bedazzlers, ranked raiders, heroic hispanics, trick teens, power princesses and mustached marauders.