The Protestant Reformation most certainly did NOT bridge the gap between early church and 1054 schism and only further de-Hellenized the situation.
First, are you saying that the early Reformers did not look at historical Christianity for its foundation? If so, you are uninformed of what they wrote.
Second, thank you for the tacit admission that the RCC in its current form started in 1054.
Baptist are not, and never have been, protestants. There has always been a group of Bible believers unbroken from the days of the Apostles themselves. Sure, they went by different names and they weren’t always strictly correct in their doctrine . . . but they eventually became known as Anabaptists (Re-baptizers) and later Baptists.
As a matter of facts, the reformers: Luther, Calvin, Zwingli, et al, and the Catholic church persecuted these believers. You can read all about it in Foxe’s Book of Martyrs.