Imperial wives

I was thinking about this in relation to Hideyoshi's elevation to
Kampaku and his family being raised to the level of an aristocratic
family on a par with the Fujiwara:

Post-Hojo Shikkenate, are there many instances of Emperors' wives
coming from non-Fujiwara stock? I believe Imperial consorts were
*supposed* to have come from the Fujiwara or gosekke clans.