I think you orgot about people like Watchman Nee, and the Waldensians, and the Italics, and the Carthinagians, and . . . oh, well.
Those Italics were pesky heretics until the bold Times New Romans exposed them.
The problem for reformed movements is that they are always looking for a new reconstructionist movement, anything to replace the historical one holy catholic apostolic church that is visible in this world from the First Century unto this day, founded according the word of our Lord Jesus the Christ upon Peter and the other Jewish Apostles and Prophets, with the Messiah himself being the chief cornerstone. All of this has been preserved and delivered to each generation.