 If you liked
Lodoss-tou Senki
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 ...then you might like
Guin Saga
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Both fantasy, both set in fictional worlds, in boths our heroes become main characters almost by accident, there is some serious world-building in both series. Protagonists must overcome great deal of danger. There is difference in art style, and Lodoss is closer to high fantasy genre, where Guin is closer to Conan-like (sword and sandals) fantasy.