Another one is:
Wotan's confession to his daughter Brunnhilde in Act II, Die Walkure by R. Wagner. A man confesses his sins to his daughter, bitter and introspective. Soon to be a "coming out of nowhere" classic.
Another great underappreciated track from the same opera is "Wotan's Farewell". It closes the opera in a veil of sadness . A little schmaltzy, but riveting.

