I'm quite taken with a portrayal of Mary that is quite new to me: Our Lady of Mercy. She is also known as Our Lady of Compassion or, in Italian, the Madonna della Misericordia. The distinctive features of such a portrayal are a capacious cloak extending outward on both sides, and persons wishing her protection beneath it.
Here is an excellent portrayal of Our Lady of Mercy by Luca Signorelli, done in c. 1490. The other main figures are Saint Sebastian and Saint Bernardine of Siena. This work is housed in the Diocesan Museum of Pienza, Siena Province, Italy.