Jaroslav Pelikan was perhaps the greatest church historian of the second half of the twentieth century. His body of work speaks for itself. For a good deal of his life he was a Lutheran but eventually he joined the Orthodox Church. Here is an interesting reflection of his about Christian tradition (including of course Protestant traditions, though many Protestants seem to be oblivious to the fact that they have traditions and not just the Bible).
“Tradition is the living faith of the dead; traditionalism is the dead faith of the living.”— J. Pelikan