I have gathered info on Internet about Ngulchu Dharmabhadra as follows:
Born 1772, passed away in 1851.
He is a lineage guru in Je Tsongkhapa’s Ganden ear-whispered Mahamudra lineage.
His collected work identifies Dorje Shugden as having arisen from the continuum of great, realized yogis that includes Duldzin Drakpa Gyaltsen, Panchen Sonam Drakpa and Tulku Drakpa Gyaltsen.
He was a great scholar, tantric master and has left many written works still used today.
Can anyone share more info about this great master?