@SadisticIgami
Then what about these?:
https://mangadex.org/title/13381/dolly-kill-kill
https://mangadex.org/title/48756/party-kara-tsuihou-sareta-sono-chiyushi-jitsu-wa-saikyou-nitsuki
https://mangadex.org/title/16617/komi-san-wa-komyushou-desu...
@Twia
There are some where they are married but just try these:
https://mangadex.org/title/3447/memories-of-emanon
https://mangadex.org/title/39858/the-elf-and-the-hunter-s-item-atelier
https://mangadex.org/title/22748/usotoki-rhetoric...
@SadisticIgami
ikr. There are manga where the mc wants to make a harem but is too innocent *cough cough*Sono Mono Nochi ni *cough cough*.
Anyway here are some recs:
https://mangadex.org/title/21469/in-another-world-with-my-smartphone...
@Draeze
https://mangadex.org/title/51376/reincarnated-as-an-aristocrat-with-an-appraisal-skill (rebuilding family power)
https://mangadex.org/title/20393/choujin-koukousei-tachi-wa-isekai-demo-yoyuu-de-ikinuku-you-desu (introducing democracy in another world)...