The Man Who Speaks to Horses. He has time and again demonstrated “join up,” where completely wild and/or formerly unridden horses work with him as he works with them.
If you like horses, watch this video:
Look up “Monty Roberts Join Up Youtube,” if you can’t watch it through here.
Then read this book. They’ve helped many horses. With his example, many horses that would have been “abused” to be “broken” are treated with understanding, rider and horse working together as a team.