Hi and welcome!
For church history (which we did alongside a two year world history cycle) we used the History Lives books, which have chapters that dramatize an incident from the life of a key leader in Church history. They included a nice variety of Christian traditions and covered the major figures you hope your kids recognize.
We also went through The Story of Christianity by David Bentley Hart. He is an orthodox theologian, so he gave a more inclusive perspective on the history of the church than some other books I’d looked at which tended to see everything through the lens of the Reformation. Some of the articles needed to be unpacked a little for my junior higher, but it was not too difficult of a level, especially considering we were reading the History Lives stories alongside it.