Actually, both Campbell and Guillard have spoken out about bigotry against women in politics particularly.

Merkel doesn't say anything she doesn't need to.  We don't know her personal views on the matter.

And I don't know what Theresa May thinks about feminism -- she's been pretty busy with Brexit.

As for Thatcher, well, she didn't even think there is such a thing as society so her understanding of social relations was obviously suspect.