The image is great and I love the colors. Great banner Gernot!
That's the Justice League from 1967. The one on the bottom is the Justice League Dark and it looks like it's Etrigan, Madame Xanadu, John Constantine, Enchantress, Deadman, and Zatanna. Personally, it's my third favorite League, the second best is the all-star Justice League (I just hope Hal Jordan returns to the team) and my personal favorite is Justice League Canada (the one with JLA alumni Martian Manhunter, Green Arrow, Hawkman, and Stargirl and newcomers Adam Strange, Animal Man, Supergirl, and Equinox). Now if only DC could introduce the Global Guardians to the New 52 Universe, I'll be on Cloud Nine.