Isekai/royalty/reincarnation/op mc/fantasy/romance/kingdom - VyvyManga

10 Isekai Harem Anime To Watch If You Love In Another World With My Smartphone

Anyone got some good action and harem manga where the mc is op - 9GAG

Nother generic isekai with OP MC and harem - iFunny Brazil

story identification - Manga where the Isekai'd main character returns to Earth but can still use magic - Science Fiction & Fantasy Stack Exchange

The Best Noble In Another World: The Bigger My Harem Gets, The Stronger I Become - Novel Updates

Isekai Tensei… Saretane

Death March kara Hajimaru Isekai Kyusoukyoku, Review

10 Manga Like Summoned to Another World Again?!

Goshujin-sama to Yuku Isekai Survival!, Isekai Wiki

16th lesser seen manga recommendation. Risou no Himo Seikatsu. Short summary in comments. TLDR, isekai with a lot of political stuff, not typical OP MC with harem and dense as all hell.