No Golden Bull of 1356

The Golden Bull of 1356 was a decree issued by the Imperial Diet at Nuremberg and Metz headed by the Emperor Charles IV which gave important aspects of the constitutional structure of the Holy Roman Empire.
Suppose there was no Golden Bull of 1356.

The Golden Bull named the seven Prince-electors who were to choose the King of the Romans, who would then usually go on to be crowned as Holy Roman Emperor by the Pope.
The Bull prescribed that four votes would always suffice to elect a new King.
The Bull confirmed the elevated role of the Electors in the Empire.

It is not as if the G created the power structure it codifies out of thin air. The Kurverein of Rhense near Koblenz in 1338 already was a meeting of the three Rhenish archbishops, the Count Palatine and the rulers of Brandeburg and Saxe-Wittenberg. Who patted each other on the back and confirmed that, yes, they were totes the guys who had a monopoly on electing the German King.
Even in the tenth century, the first four dignitaries from along the Rhine had had a elevated position among the imperial princes who as a whole elected the kings. The three "Easterners" joined them later for being quite influential:
In the contested election of 1198, a ad hoc committee of Cologne, Mainz, Palatinate and the Duke of Saxony was created.
Brandenburg has joined the others by mid-13th century.

So the lack of the GB would not change much poltically. Well, I do not not if it was earlier already forbidden to partition electoral lands among the heirs. If that law does not happen, we might see Brandenburg-Küstrin, Brandenburg-Potsdam, Brandenburg-Köpenick, Brandenburg-Tangermünde fighting over the electoral dignity.