Simple question, was there ever a proposal to crown a king of an independent Canada that was not also King of Britain? preferably someone who is not British.
At the point where Confederation occurs in 1867, it goes further and declares independence under it's own monarchical system.
They invite either the family of the Duke of Cambridge, or of Prince Alfred to take the throne.
House of Cambridge:
1867-1904: George I and V
1904-1916: Augusta (1)
1916-1918: Frederick (2)
1918-1948: Marie (3)
1948-1982: George II and VI (4)
(1) - After her brother died without legitimate issue, she comes to the throne aged 82.
(2) - Grandson of Queen Augusta and only survived her by two years, after his own father the Crown Prince died two years before her.
(3) - After her brother provides no issue, she takes the throne.
(4) - Following his mother's first marriage and divorce to Count Jametel, George and his sister become heirs to the throne ...