Isekai / Reincarnated TRASH [DO NOT READ!!]

Ecchi
https://www.mangaupdates.com/series/u0y8moi/drawing-saikyou-mangaka-wa-oekaki-skill-de-isekai-musou-suru

Harem
https://mangadex.org/title/05a56be4-26ab-4f50-8fc0-ab8304570258/drawing-saikyou-mangaka-wa-oekaki-skill-de-isekai-musou-suru

Harem
https://www.novelupdates.com/series/it-is-a-different-world-and-yet-i-am-cultivating-monsters-ln/

https://www.mangaupdates.com/series/755jgbp/isekai-desu-ga-mamono-saibai-shiteimasu

https://www.mangaupdates.com/series/l8dz4s1/saikyou-no-ossan-hunter-isekai-e-kondo-koso-yukkuri-shizuka-ni-kurashitai

Harem?
https://mangadex.org/title/0f83e219-f445-4b9b-96d1-dde82d254f3c/saikyou-no-ossan-hunter-isekai-e-kondokoso-yukkuri-shizuka-ni-kurashitai

https://global.manga-up.com/manga/92
Final Chapter: Volume 5, Chapter 30 (Hiatus)

https://ncode.syosetu.com/n7638eq/

Ecchi
https://www.mangaupdates.com/series/m6cmr1r/isekai-saikyou-no-seikishi-wa-joujakusugite-kyou-mo-net-enjoushiteru-ff-gai-kara-shitsureishimasu

https://mangadex.org/title/16b6afc7-456a-4adc-a696-706cdf6f692b/isekai-saikyou-no-seikishi-wa-joujakusugite-kyou-mo-net-enjoushiteru-ff-gai-kara-shitsureishimasu

Harem (harem seeking ML)
Axed/Cancelled/Discontinued
https://www.mangaupdates.com/series/cw48yd6/tensei-inja-wa-hokusoemu

https://mangadex.org/title/5470fb21-028e-49e7-8b1e-2df5946ce0aa/tensei-inja-wa-hokusoemu

Harem, Polygamy
https://www.novelupdates.com/series/nidome-no-yuusha/

Axed/Cancelled/Discontinued
https://www.mangaupdates.com/series/54krqk2/nidome-no-yuusha-wa-fukushuu-no-michi-wo-warai-ayumu

Harem
https://www.novelupdates.com/series/a-hero-trained-by-the-most-evil-demon-king-is-unrivaled-in-the-academy-of-returnees-from-another-world/

https://www.mangaupdates.com/series/ijjdf61/saikyou-no-maou-ni-kitaerareta-yuusha-isekai-kikanshatati-no-gakuen-de-musou-suru

Harem
https://www.novelupdates.com/series/reincarnated-as-the-mastermind-of-the-story-ln/

https://www.mangaupdates.com/series/6852zo6/monogatari-no-kuromaku-ni-tensei-shite

Ecchi
https://www.mangaupdates.com/series/m8l6vkf/isekai-munchkin-hp-1-no-mama-de-saikyou-saisoku-dungeon-kouryaku

https://mangadex.org/title/39741b91-7782-452d-984b-70b3df834976/isekai-munchkin-hp-1-no-mama-de-saikyou-saisoku-danjon-kouryaku

Ecchi
https://www.mangaupdates.com/series/y0xt5lt/cheat-eater-isekai-shoukan-kotogotoku-horobubeshi