Table:
text: List of Greek royal consorts
(since 1862)
(since 1862)
Name_ Birth Marriage Became_Consort Ceased_to_be_Consort Spouse
Amalia of Oldenburg 21 December 1818 22 November 1836 23 October 1862 husband`s desposition 26 July 1867 husband`s death Otto
Gisela of Austria 12 July 1856 20 April 1873 12 December 1912 husband`s accession 28 September 1930 husband`s death Prince Leopold of Bavaria
Bona Margherita of Savoy 1 August 1896 8 January 1921 31 May 1943 husband`s accession 6 September 1969 husband`s death Prince Konrad of Bavaria
Helene von Khevenhüller-Metsch 4 April 1921 16 November 1970 16 November 1970 1 January 1997 husband`s death Prince Eugen of Bavaria
Disputed Disputed Disputed Disputed Disputed Disputed

Question: Who has had a controversial marriage among Greek royal consorts since 1862?