Stranger: Mukou Hadan, Dororo Recommendations
They both are set in the same time period. They portray a very dark and violent view of this era and boost fantastic fights. The main characters of both series seem to have a similar dynamic with a more talkative 10 year old boy and a quieter badass.
Both shows also involve one of the duo being sacrificed to a demon. In Sword of the Stanger, No Name is protecting the kid from being sacrificed, while in Dororo, Hyakkimaru has already been sacrificed.
Both shows revolve around the 'badass' sword master undergoing on a journey of sorts while accompanied by a young boy. Both shows also deal with demons/supernatural entities to an extent