The Omega Rangers
In 1982, alongside the First Family, they helped defeat the power-crazed Hellsignor. Quick action by Point Man snatching the Gem of Thebis, turned the tide of the fight. It was also the act that led to the incarnation (and perhaps reincarnation) of the modern deity-like hero, Cleopatra.
It's likely this group wasn't active for any substantial period of time. It's members seem less like a team, than a collection of individual heroes. Many of them were relatively new on the scene at the time.