Not every group could be the World's Greatest Superhero team. Nor a team of teens. Nor a monolithic membership in the dozens. However, these twin teams have something the others lacked, a gritty determination to prove themselves despite the odds being stacked against them, for which they succeeded.
The Outsiders was formed when Batman left for Markovia to free his friend Lucius Fox, held hostage by that nation's dictator Baron Bedlam. Recruiting Metamorpho and Black Lightning, two mem who rejected Justice League membership, the trio encountered another terrific triad: Katana, Geo-Force and young Halo. Seeing the need to have a team of Outsiders working outside the normal bounds of superheroics, the Dark Knight relocated his five teammates along with their ally scientist Helga Jace to his Gotham City headquarters beneath Wayne Foundation where this group battled many foes over a span of years.
Law's Legionnaires were a band of brothers in a sense that they all had a common purpose, defeating the criminal hordes of their day. While not headliners like their peers of the Justice Society, they more than measured up with their tenacity and determination. Consisting of Vigilante, Green Arrow with sidekick Speedy, Crimson Avenger, Shining Knight, Stripesy and the Star-Spangled Kid... oh and the Avenger's partner Wing tagged along from time-to-time. This team also had several adventures versus a variety of villains for some years. Then they disappeared to reappear in modern times.
Each team had the crimefighter (Batman and Vigilante), the adaptable avenger (Metamorpho and Green Arrow), the colorful crusader (Black Lighting and Crimson Avenger), the sword-weilding savior (Katana and Shining Knight), the courageous carrot-top (Geo-Force and Stripesy) and the cosmic kid (Halo and Star-Spangled Kid). While not exact counterparts, they filled similar niches.