I gotta be honest and say I'm not fond of any of those names, sorry. The middle name that springs to mind with Charity is Grace. I do like Jeremy for a boy. I had that on my list for DD and it almost made the cut for DH as well. The middle name would have been C raig. I think a shorter middle name would be best with both Charity and Jeremiah. My first thought for Jeremiah is Jeremiah John.

Others:
Jeremiah George
Jeremiah Mark
Jeremiah Zane
Jeremiah Blake

Charity Faith
Charity Anne
Charity Kate
Charity May