Franz Joseph I of Austria
If Greater Germany was to prevail, the crown would necessarily have to go to Franz Joseph, who had no desire to cede it in the first place to anyone else. On the other hand, if the idea of a smaller Germany won out, the German crown could of course not possibly go the Emperor of Austria, but would naturally be offered to the head of the largest and most powerful German state outside of Austria—the King of Prussia. The contest between the two ideas, quickly developed into a contest between Austria and Prussia. After Prussia decisively won the Seven Weeks War, this question was solved; Austria lost no territories as long as they remained out of German affairs.
Charles VII, Holy Roman Emperor
During the War of the Austrian Succession Charles Albert invaded Upper Austria in 1741 and planned to conquer Vienna, but his allied French troops under the Duc de Belle-Isle were redirected to Bohemia instead and Prague was conquered in November 1741. So Charles Albert was crowned King of Bohemia in Prague (19 December 1741) when the Habsburgs were not yet defeated. He was unanimously elected "King of the Romans" on 24 January 1742, also with the vote of George II, and became Holy Roman Emperor upon his coronation on 12 February 1742. His brother Klemens August of Bavaria, archbishop and elector ("Kurfürst") of Cologne, who generally sided with the Austria Habsburg-Lorraine faction in the disputes over the Habsburg succession, cast his vote for him and personally crowned him emperor at Frankfurt. Charles VII was the second Wittelsbach Emperor after Louis IV and the first Wittelsbach King of the Romans since the reign of Rupert of Germany.