J.I Packer was a giant in the field of theology. His book Knowing God is considered required reading at many seminaries. He was part of the Anglican Church Canada until they adopted a non scriptural view of sexuality. He literally turned in his papers.
I grew up Lutheran, and in fact went to a Lutheran seminary for 3 years. I joined an Episcopal Church in 2008 or 2009. My family is currently "between churches" ... long story ... but I have been a member at that church longer than any other church.