I thought the role of Ezra (not necessarily during the exile) was unanimous among Jews. I'm Catholic and the Jewish tradition we inherited says Ezra played a major role in the making of what we call OT.
The Catholic approach to OT is primarily historical. We are interested in the development of the strong concept of monotheism built by the Jews. No other people built such massive concept of monotheism.
We understand the OT is written in an exaggerated way. That's the Jewish way of teaching. Jesus used it.
The account of creation (of human souls) is very sophisticated too. Sadly pentecostal fundamentalism hijacked it.
And of course the concept of a Messiah.
It's good to have a well educated person in this forum who knows the ancient (and original) way to cope with Holy Scriptures.
You could talk about the Jewish view of the (second) destruction of the Temple and how it was seen as the end of the world itself. Non Catholic Christians have a hard time to understand the importance of the Temple to Jews.