Who were the only two women who wore the crown of St. Stephen, the coronation crown of the Kingdom of Hungary?

Maria of Anjou ruled Hungary and Croatia between 1382 and 1385, and from 1386 until her death in 1395.

Maria Theresa was ruler of the Habsburg dominions from 1740 until her death in 1780. She was the sovereign of Austria, Hungary, Croatia, Bohemia, Transylvania, Mantua, Milan, Lodomeria and Galicia, the Austrian Netherlands, and Parma.

Interestingly, both women did not officialy bear the title of a "Queen of Hungary" but were crowned explicitly as a "King of Hungary" since there was no provision in the constitution for a female ruler.

https://en.wikipedia.org/wiki/Coronation_of_the_Hungarian_monarch

https://www.habsburger.net/en/chapter/eljen-kiraly-long-live-king-maria-theresa-and-hungary