Step 1: Understanding the Concept:
The question asks to identify a historical figure who held the position of German Chancellor.
Step 2: Detailed Explanation:
\[\begin{array}{rl} \bullet & \text{Otto von Bismarck: He was a prominent Prussian statesman who orchestrated the unification of Germany in 1871. He served as the first Chancellor of the German Empire from 1871 to 1890 and is famously known as the "Iron Chancellor".} \\ \bullet & \text{The other figures are not German Chancellors:} \\ \bullet & \text{Giuseppe Mazzini: An Italian revolutionary and a key figure in the unification of Italy.} \\ \bullet & \text{Georg Wilhelm Friedrich Hegel: A German philosopher.} \\ \bullet & \text{Victor Emmanuel II: The first King of a unified Italy.} \\ \end{array}\]
Step 3: Final Answer:
Among the given options, Otto von Bismarck was the German Chancellor.