Prior to the Reformation there wasn't much choice other than RC. So were any of those folks saved?
I would say yes, if they were a disciple of Jesus Christ.
Yes, precisely. Prior to Martin Luther, what was there? The RCC was the ubiquitious religious institution. Over the centuries there were various men and women who shone for Christ and displayed a very deep sensitivity for the gospel and the love of God to a lost world. Of these, we can mention luminaries like Fenlon, St. John of the Cross, Guyon, Martin Boos, Savanrola, Brother Lawrence. For the most part, these saints were persecuted by the very institution (the RCC) they so ardently sought to remain faithful to and support. In other words, they refused to leave the "Mother Church", but many preached the gospel just as fearlessly as Whitefield and John Wesley, and some, like Savanrola, were martyred for it.
Of course, the objection that the abovementioned men and women were nothing but apostate mystics will be sounded by some, but that shouldn't matter. Non-RCC Men like Ravenhill, Tozer, John Wesley and others have been influenced by and attest to the authenticity of their ministries, and even writing mini-bios on some of their lives. Plus, some of their sermons and writings are featured here, on SermonIndex.
Salvation is not about being a part of or not being part of the RCC, or being Southern Baptist or Pentecostal or Lutheran or any denominational or nondenominational system for that matter. It is about the advent of the New Birth, which, in itself, is a very mysterious thing! Jesus Himself didn't go into very much detail when asked about it by Nicodemus. He likened it unto the mysterious "blowing of a wind" that no one could precipitate, prognosticate or prevent. If this "blowing" doesn't occur on an individual, then his or her RCC, Presbyterian or Anglican church affiliation is absolutely meaningless.
So the question again must be asked: Can the "blowing" of the Holy Spirit on an individual occur within the confines of the RCC? If the answer is no, then we must objectively prove the stance, which of course is impossible. I've discovered that people who make such blanket sweeps in judgment somehow assume the wind blows on denominations and on church steeples rather than on individuals hungering for God and following Christ in a way different from their own.