Yes, these guys are your (grand)parents' superheroes!
If the "Trinity" is the backbone of the JLA, these three are the heart-and-soul of the JSA!
WILDCAT- Former world heavyweight boxing champ Ted Grant had gone the distance with Joe Louis. The right hook Louis felt is the same that a lot of criminals have felt! Wildcat has helped trained a lot of today's heroes (including Batman, Nightwing, and Black Canary).
THE GREEN LANTERN- Before Abin Sur gave Hal Jordan his power ring, Earth already had a Green Lantern. Alan Scott found a magic lantern, from which he fashioned a ring to fight against injustice. Unlike modern Lanterns, Scott's ring had a weakness to wood, not the color yellow.
THE FLASH- Jay Garrick is the man that would inspire many to take up the mantle of "The Flash". Barry Allen was a life-long fan even before the accident that would grant him super-speed. The others to follow Allen all held a deep respect and admiration for Jay Garrick.