Post-18th century Non-Habsburg Emperor

With a POD after 1700, is it plausible/possible for a non-Habsburg to become Holy Roman Emperor, or was the crown entirely de facto hereditary for them by that point?
 
Charles VII? Franz I?

How about this? Charles VI has no children whatsoever. Maria Josepha inherits. Her Wettin husband is Emperor and then so are their descendants.
 
Charles VII? Franz I?

How about this? Charles VI has no children whatsoever. Maria Josepha inherits. Her Wettin husband is Emperor and then so are their descendants.

Franz I is still Habsburg (Habsburg-Lorraine), though yes, forgot about Charles VII, though he was the only non-Habsburg Emperor in a period of about 400 years, though this was more a side effect of the War of the Austrian Succession than anything.
 
Franz I is still Habsburg (Habsburg-Lorraine), though yes, forgot about Charles VII, though he was the only non-Habsburg Emperor in a period of about 400 years, though this was more a side effect of the War of the Austrian Succession than anything.

Actually Franz I was just Lorraine. He never took his wife's name.
 
Franz I is still Habsburg (Habsburg-Lorraine), though yes, forgot about Charles VII, though he was the only non-Habsburg Emperor in a period of about 400 years, though this was more a side effect of the War of the Austrian Succession than anything.

Technically, no, he's not. He was a member of the House of Lorraine. His wife was a member of the House of Habsburg and their issue were members of the House of Habsburg-Lorraine. Yes, he was basically a proxy for the House of Habsburg to circumvent male-preference, but Franz I was not a member of the House of Habsburg.

EDIT: Ninja'd
 
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