Favorite Oscar-Nominated Noble Performance?

Which of these select all-time Oscar-nominated performances depicting a noble* rank or born-to-nobility movie character, excluding the immediate royal family is your favorite?

* Duke, Duchess, Marquess, Marchioness, Earl, Count, Countess, Viscount, Viscountess, Baron, Baroness, Lord, Lady or other noble-born characters (real-life, fictional or alleged)

Discuss the topic here.