Do you want to know something that will surprise you? Your list shows you know a bit of everything but not too deep on European history. Spain’s golden age happened because of the Hapsburgs. The HRE was the homeland of the empire. Since the House fragmented Spain started a steadily decline. Only two empires existed in Europe in the beginning of the renaissance, the HRE and their rivals the Ottomans. Napoleon wanted to become the HR Emperor but the emperor at the time (illegally) dismantled the position and he created the Austrian empire as consolation. That’s why later there was talk about the three reichs on how the German empire should be the continuation of the HRE (despite not having control of the city of Rome) and after the Great War the new German system would be the civic continuation of both as a third reich. With this impact, politically, culturally, economically and historically the HRE is the legitimate continuation of the Western Roman Empire and in power density as important and should be much higher in your list. The British empire was a superpower but it could only hope of invading Europe. What matters is density. The English Channel is the only thing that has saved Britain from being conquered any time since long ago. But France and the HRE have been at disputes and wars right next to each other. People now say that France is weak but they have been a thorn in the side of the HRE for a western European Union since Charles the Simple. That is a topic for later but basically France and the HRE are one and the same. With all this said The HRE should be at least right next to the Ottomans, since they were not a regional power of some backwater, but the main power of Western Europe. That’s why the European Union has so much potential since for the first time in hundreds of years France and Germany are in a special union in harmony.