Phil Coulson

Recruited by S.H.I.E.L.D while he was in college, trained by Nick Fury
Served as the primary operative in the Avengers Initiative
Killed by Loki but brought back to life by S.H.I.E.L.D.
Given a team to investigate the cases S.H.I.E.L.D. had not yet classified
Appointed as the new Director of S.H.I.E.L.D. after the HYDRA Uprising
Left hand was chopped to stop the effects of the Terrigen Crystal, and gained a cybernetic replacement
Died from his old injury due to a deal he made with the Spirit of Vengeance
After his final death, a Chronicom LMD containing all of his memories was created