Responses
Maybe this one? https://www.mangago.zone/read-manga/moon_led_journey_across_another_world/
Idk if it counts as harem when he have many people around him, so far no romance at all.
Maybe not your type plot but it’s good one.
Any isekai/reincarnation manga (not manhwa/manhua), no harem, no romance, just adventures?
Something like this one?
https://www.mangago.zone/read-manga/tondemo_skill_de_isekai_hourou_meshi/