As this topic got well over my head, I moved on to others (hopefully less over my head) here on the Downs. Meanwhile, in the Movies forum, a reference was posted to an article that I think is applicable to this topic. (It is a short read.)
"Our culture is sadly unused to fully realized portrayals of good characters."
I think it is applicable to the previous discussion in that some 'modern' reviewers (and film makers) may come to these books without an ability to appreciate Tolkien's ability to portray good. Perhaps we have a state of culture such that we find "evil more fascinating than good."
(Thanks to
mark12_30 for the link.)