https://www.mangago.zone/read-manga/isekai_ni_otosareta_jouka_wa_kihon/
https://www.mangago.zone/read-manga/trash_of_the_count_s_family/
https://www.mangago.zone/read-manga/isekai_apocalypse_mynoghra_the_conquest_of_the_world_starts_with_the_civilization_of_ruin/
https://www.mangago.zone/read-manga/joou_heika_no_isekai_senryaku/ (rushed ending on this one/dropped, leaves more questions than answers)
https://www.mangago.zone/read-manga/tondemo_skill_de_isekai_hourou_meshi/
https://www.mangago.zone/read-manga/saijaku_teima_wa_gomi_hiroi_no_tabi_o_hajimemashita/
https://www.mangago.zone/read-manga/how_to_live_as_a_villain/
https://www.mangago.zone/read-manga/isekai_yururi_kikou_kosodateshinagara_boukensha_shimasu/
https://www.mangago.zone/read-manga/i_became_the_tyrant_of_a_defense_game/
https://www.mangago.zone/read-manga/stuck_in_the_tower/
https://www.mangago.zone/read-manga/i_became_an_evolving_space_monster/
Any isekais that don't have a romance plot?? I really like ones with the focus on the parenhood or revenge