Actually this post has maybe inadvertently created a more interesting question, who do we and who don't we consider German in history. Had by Charlemagne's time the Franks stopped being considered German, or by Penda's time in England. How about the Vikings or the Vandals? And when did people start being German, such as the Prussians? was Austro-Hungary ever German?
The definition of “German” is a bit confusing because of cultural and language differences between countries. In English, Germany typically refers to the modern state and can refer to the Kingdom of Germany/Kingdom of Romans/East Francia established by the treaty of Verdun. German is a subsection of West Germanic which in turn is a subsection of Germanic.
So, in my opinion, the treaty of Verdun and the establishment of East Francia is a good clean beginning of what we can call Germany and German. But I think it’s splitting hairs if earlier Frankish Kings aren’t considered German. So, no argument from me against anyone who wants to pick Charlemagne—but I’d say the same thing if this was “Greatest French Kings” thread. Again, with France, I’d say the Treaty of Verdun is a good starting point.
But I wouldn’t say East Germanic Kings (Goths, Vandals, Gepids and such). Their legacy can be found in Germany, but also in many other European cultures, including nearly every West European culture, from Iceland to Sweden to the Balkans, Ukraine, Italy, France, and Spain… and the cultural footprint is likely stronger in those regions than modern Germany. The Migration era was a very messy (but also fascinating) time period
