The question assumes (and seems to even presume) two major things: 1) That Christ came predominantly as an example to be emulated and 2) That the example of Christ, the man, has particular application to the male gender individually and societally. Given these assumptions the question asks Reformed Theology for a female role model likened unto Mary as expounded in Catholicism.
A strong correlation is supposed to exist such that the historical increase of truths liberating women "emanating from Christ and Mary through the mediating influence of the Catholic Church are transforming the world and progressively reversing the curse upon Eve". It would need to be demonstrated that the Protestant reformation and the formal advent of Reformed Theology represent a correlative subduing of these liberating truths regarding women in history since the 16th century.
A reformed look at the assumptions listed above would have to begin at Genesis 1:27:
So God created man in his own image, in the image of God he created him; male and female he created them.
Right from the very beginning there is a distinction in gender without a difference in humanity: Man, as created by God, includes both male and female. Both were formed by God from previously created matter (dust and a rib) and both, without distinction, are in His image. Since Jesus Christ came, uniquely in the image of the invisible God and filled with all Divine fullness (Colossians 1:15, 19), formed by the Spirit of God within the already created matter of a woman, he is therefore able to represent the image of God in which Man was created irrespective of gender. Thus He is savior of both male and female without distinction.
There is also, right from the beginning, a distinction in roles. The man was created first and the reason given for the creation of the woman is:
“It is not good that the man should be alone; I will make him a helper fit for him.” Genesis 2:18
This should not be taken to indicate that the male, in his humanity, was created with some lack or deficit since the Divine intention to create Man (in His image) as both male and female is stated prior to the formation of either Adam or Eve. It should also not be understood from this that the woman was created with a "functional inequality" that the Church and the proclamation of the gospel should strive to overcome. While it is certain that the sinful heart of Man has birthed and promulgated all manner of grievous societal ills it needs to be stridently maintained that gender, and certain roles assigned to gender, were created by God prior to the incursion of sin and are therefore included in the statement "And God saw everything that he had made, and behold, it was very good". It is therefore to be understood that gender finds it's meaning as divinely assigned roles for humans rather than distinctive valuations as humans.
Scripture is replete with godly women who are held up as examples for us to follow. Prominent is Hebrews chapter 11 in which are listed Sarah and Rahab. These women are lifted up along with the many men with which they are enumerated, not for gender specific tasks, but for the faith by which they lived:
By faith Sarah herself received power to conceive, even when she was past the age, since she considered him faithful who had promised. - Hebrews 11:11
By faith Rahab the prostitute did not perish with those who were disobedient, because she had given a friendly welcome to the spies. - Hebrews 11:31
And, indeed, Mary is to be esteemed for the faith by which she humbled herself under the calling with which God called her while yet a virgin:
“Behold, I am the servant of the Lord; let it be to me according to your word.”
But to look to Mary or any other person for something gender specific that is supposed to be lacking in what the (male) Christ has exemplified is a category error for:
There is neither Jew nor Greek, there is neither slave nor free, there is no male and female, for you are all one in Christ Jesus. - Galatians 3:28
It is therefore not a gender specific example that Christ has given us but an example of human faith to be lived out in whatever situation one finds themselves.
Only let each person lead the life that the Lord has assigned to him,
and to which God has called him. This is my rule in all the
churches. Was anyone at the time of his call already circumcised? Let
him not seek to remove the marks of circumcision. Was anyone at the
time of his call uncircumcised? Let him not seek circumcision. For
neither circumcision counts for anything nor uncircumcision, but
keeping the commandments of God. Each one should remain in the
condition in which he was called. Were you a bondservant when
called? Do not be concerned about it. (But if you can gain your
freedom, avail yourself of the opportunity.) For he who was called in
the Lord as a bondservant is a freedman of the Lord. Likewise he who
was free when called is a bondservant of Christ. You were bought with
a price; do not become bondservants of men. So, brothers, in
whatever condition each was called, there let him remain with God. -
1 Corinthians 7:17-24
Reformed Theology holds that there are God ordained roles for both men and women in the family, the church, and the world and that these not necessarily be identical. It also affirms that the fallen nature of Man tends toward the abrogation and corruption of all that God has created. The reconciliation of the two is in lifting up Christ and the clarion call for Reformed Theology specifically and Protestantism in general is as follows irrespective of gender:
For you have need of endurance, so that when you have done the will of God you may receive what is promised. For, “Yet a little while, and the coming one will come and will not delay; but my righteous one shall live by faith, and if he shrinks back, my soul has no pleasure in him.” But we are not of those who shrink back and are destroyed, but of those who have faith and preserve their souls. - Hebrews 10:36-39
There is no need, in Reformed Theology, for a female example of perfection to lift up before women "to convey the truth that women can be perfected" since our perfection, both male and female, is in Jesus:
For by a single offering he has perfected for all time those who are being sanctified. - Hebrews 10:14