Capricorn
Capricorn is cardinal earth ruled by Saturn, and it builds toward the summit by patience and discipline: the long plan, the earned authority, the work that compounds over time. It respects limits because it knows how to use them, ascending with a seriousness of purpose that treats responsibility as a kind of dignity.
That drive can harden into coldness, or an austerity that mistakes achievement for worth. At its best, Capricorn is the integrity and endurance that carries weight without complaint — the architect who outlasts the easier paths.