Chief Seattle was a Suquamish Tribe and Dkhw'Duw'Absh chief. A prominent figure among his people, he pursued a path of accommodation to white settlers, forming a personal relationship with "Doc" Maynard. The city of Seattle, in the U.S. state of Washington, was named after him
Further on in that Wikipedia article it says Seattle did own slaves, captives taken in raids.
Some Northwest Indian tribes even killed slaves to use as rollers for the canoes of their guests, as they arrived at a potlatch.
Every human alive must be the descendant of successful murderers, rapists, slavers and conquerors. The amazing thing is that we can be better than that at all.