 If you liked
Trigun
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 ...then you might like
Sousou no Frieren
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Frieren & Vash are transcendent beings that have lived longer than the rest of humanity, and they retrace the lands that they have been before; in order to keep the memories and values alive from the people whom they considered important in their lives and have made significant impacts to the world in the distant past.
They revisit places they have saved or travelled in the past to rectify any issues they may have; (travelling along with companions & learning about each other.) Both of these anime are made by Madhouse Studios.