President

Today's xkcd is simply too appropriate not to appropriate.

For what it's worth, Kennedy was the first G.I. Generation President, and he started a run of G.I. that lasted to Bush Senior. (Even if some say that he and Carter should be counted as Artists. ) His election was in 1960, and his generation's birth dates ran from 1901 to 1924.

As the Hero archetype was skipped during the Civil War Crisis, the previous equivalent would be Thomas Jefferson, who similarly was elected (in 1800) roughly 60 years after the start of his cohort (1742).

Which means the equivalent election for Millennials - that is, about 60 years from the start of the cohort (1982) -  would be 2040.