The original line-up consisted of:
*
Green Arrow & Speedy (first appeared in
More Fun Comics #73, cover-dated November 1941)
*
Star Spangled Kid & Stripesy (first appeared in a brief preview published in
Action Comics #40, cover-dated September 1941, then appeared regularly in
Star Spangled Comics starting with October 1941's issue#1)
*
Shining Knight (Sir Justin) from
Adventure Comics starting with issue #66 (September 1941)
*
Vigilante (Greg Saunders) who first appeared in
Action Comics #42 (Nov. 1941)
*
The Crimson Avenger from
Detective Comics.
(see separate "Original Golden Age Crimson Avenger (Lee Travis) appreciation thread" for more on him)
There was also
Wing (Wing How, the Crimson's stereotypical valet / sidekick) who many, many years later would sometimes be referred to as the Eighth Soldier.