Regarding your Hapkido family tree, that is an impressive collection. I did notice that Sung Moo Kwan was not mentioned. That was founded by the late Lee Chong Moon. I had the honor of studying under him in Korea, being promoted to 2nd Dan. He taught me 3rd Dan techniques, but I never tested for that. Nor have I been active in studying for the last many odd years due to life issues, including health.
I think like many arts, there are many Hapkido kwans that are started by relative unknowns (not including GM Lee), who may or may not be excellent teachers. Often hard to keep up with all of them.