 If you liked Seirei no Moribito |  ...then you might like Sousou no Frieren |
Both Sousou no Frieren and Seirei no Moribito are beautiful journeys into well drawn worlds where you get lost in the story. They both have a palpable feel of being in a real alternate reality where characters look and act like people we know from our real-world lives. They take place in a world of magic that is grounded in rules that their respective authors stick by. But, more compelling than any other reason, both series have a heart of real emotion and depth of experience.