Who was arguably most influential in the unification of Germany?

The correct answer for the given question above would be Otto von Bismarck. Otto von Bismarck was arguably one of the most influential figures in Germany's unification. Otto con Bismarck designed a series of wars that ultimately led to the unification of the disparate German states. He was chancellor of Prussia and Germany and out played everybody at diplomacy and foreign affairs. Hope this answers your question.