I take it back -- Coulson's not Ejofor, he could be like Book. Unassuming, harmless but really deadly. Steve could be the Ejofor character -- they both have this thing about faith and belief in a cause. Tony could be a mix of Mr. Universe and Badger. Bruce has probably some Reaver in him. And I kinda like the idea that Bucky would be a brainwashed Man with Blue Hands (or in his case, Man with Steel-Blue Arm).