The double-page poster shot below of the 1970's Justice League of America is perhaps my all-time favorite image of the team. Here we see handsome heroes gathered for noble purposes to protect mankind. Here we see a team of heroes who are for the most part genial and friendly with one another, who overcome differences of origin and background and perspective to work together for the greater good.
There's no "action" in this shot, only people between crisis points taking time to deal with the day-to-day of life. This poster says these are regular people.
These are heroes.
I found this wonderful scan here
Dick Giordano is credited with the great covers to this over-sized classic.