2. Falcon
The ground rules are stretched for the Falcon, given that his first appearance came in the waning months of 1969 in Captain America #117, but the Falcon more properly belongs to the 1970s than the 60s. This isn't the first time Falcon has proven himself exceptional, overcoming a bizarre origin story involving a body-swapped Captain America trapped on the Red Skull's Isle of Exiles and (yes) a truly dire costume to become a solid middle-tier Marvel character, even earning himself a co-starring role in this 2014's Captain America: The Winter Soldier film. Falcon is better known for his more stylish red-and-white costume, which he sported through the bulk of the 1970s, but his first costume was a muddy green-and-orange affair, with yet another plunging v-neck front-and-center. Despite his name, the Falcon was originally an earth-bound hero, so he couldn't even enhance his silhouette with the under-arm wings that would characterize his later costumes. No, this Falcon was just a color-blind brother with a v-neck and a precocious pet bird. Even Captain America seemed taken aback by Falcon's appearance.
The Falcon had the last laugh, though, as the high-tech costume sported by Anthony Mackie in Captain America: Winter Soldier seems certain to send the Falcon soaring to the front rank of Marvel's cinematic superheroes.