Hitler didn’t create the German Workers Party - predecessor to the Nazi Party. He just rose to power within it. The seeds for the Reich were sown by Dietrich Eckart & Anton Drexler. The foundation of the Nazi ideology; antisemitic, nationalist, anti-capitalist were very popular traits common in Europe shared by many leaders.
If Hitler had never lived it most likely would have changed absolutely nothing.
If Hitler had never lived. the German Workers’ Party would have achieved bupkus. Eckart and Drexler were a couple of yo-yos [especially Drexler]. Hitler MADE the Party