Nerium

https://www.mangago.me/read-manga/emergency_youth_record_book/

https://www.mangago.me/read-manga/love_is_sweet_living_together_is_spicy_19_luna_toons/

https://www.mangago.me/read-manga/yang_il_woo_and_i/

https://www.mangago.me/read-manga/our_sunny_days/

https://www.mangago.me/read-manga/unrequited_love_rendezvous/

https://www.mangago.me/read-manga/sugar_trap/

https://www.mangago.me/read-manga/my_guildmate_next_door_shortcut_scans/

https://www.mangago.me/read-manga/first_of_summers/

https://www.mangago.me/read-manga/tonari_no_hachuurui_kun/

https://www.mangago.me/read-manga/1995_youth_report/

https://www.mangago.me/read-manga/one_room_ta/

https://www.mangago.me/read-manga/happy_together_paradise_scans/

https://www.mangago.me/read-manga/beware_of_drunken_relationships/

https://www.mangago.me/read-manga/die_in_my_arms_kaizen_scan/
https://www.mangago.me/read-manga/yang_il_woo_and_i/

My favourite is this masterpiece, the BEST new-gen DARK FANTASY, ACTION SHOUNEN MANGA of the 2020s, the peak of human literature, Kagurabachi! If you're looking for a story with a more slow-burning pacing and world-building, but masterfully-written plot, realistically written and interesting characters with great designs, GORGEOUS ART that evolves with each new chapter, MOVIE-LIKE fighting choreography, BEAUTIFUL panelling and composition and NO ROMANCE, ZERO FANSERVICE AND ABSOLUTELY NO SEXUALISATION, ESPECIALLY OF IT'S FEMALE CAST!! OH ALSO IMPORTANT MENTION; DON'T DROP THIS AT CHAPTER 58 (IYKYK), TRUST THE PROCESS OF HOKAZONO-SENSEI'S GENIUS!!  GO READ IT NOW!!!

https://www.mangago.me/read-manga/kagurabachi/ (PEAK FICTION)

Also these other shounen/seinen (mostly action) mangas are great, too:
https://www.mangago.me/read-manga/gokurakugai/
https://www.mangago.me/read-manga/windbreaker/
https://www.mangago.me/read-manga/tokyo_aliens/
https://www.mangago.me/read-manga/gachiakuta/
https://www.mangago.me/read-manga/galaxias/
https://www.mangago.me/read-manga/ghost_fixers/
https://www.mangago.me/read-manga/centuria/
https://www.mangago.me/read-manga/psycho_eyes/
https://www.mangago.me/read-manga/witchriv/
https://www.mangago.me/read-manga/chainsaw_man/
https://www.mangago.me/read-manga/ultimate_exorcist_kiyoshi/
https://www.mangago.me/read-manga/madan_no_ichi/
https://www.mangago.me/read-manga/tongari_boushi_no_atelier/
https://www.mangago.me/read-manga/magical_girl_and_narco_wars/
https://www.mangago.me/read-manga/the_marshal_king/
https://www.mangago.me/read-manga/kai_hen_wizards/
https://www.mangago.me/read-manga/ruby_on_the_cake_hitogui_majo_no_bansankai/

And these GLs:
Fluff:
https://www.mangago.me/read-manga/toward_the_blue_athrea_scans/
https://www.mangago.me/read-manga/the_moon_on_a_rainy_night/
https://www.mangago.me/read-manga/yuzu_and_rika/
https://www.mangago.me/read-manga/the_magical_revolution_of_the_reincarnated_princess_and_the_genius_young_lady/
https://www.mangago.me/read-manga/gal_loving_jk_wants_to_be_a_gal/
https://www.mangago.me/read-manga/yuri_yuri_panic/
https://www.mangago.me/read-manga/makoto_senpai_no_mae_de_wa_kakko_tsukerarenai/
https://www.mangago.me/read-manga/fox_and_elixir_athrea_scans/
https://www.mangago.me/read-manga/can_i_call_you_unnie/
https://www.mangago.me/read-manga/i_favor_the_villainess/
https://www.mangago.me/read-manga/watashi_to_kanojo_no_kawaii_koi_no_hajime_kata/
https://www.mangago.me/read-manga/32_cm_height_difference/
https://www.mangago.me/read-manga/the_moon_does_not_count_sheep/
https://www.mangago.me/read-manga/kamiina_botan_yoeru_sugara_wa_yuri_no_hana/
https://www.mangago.me/read-manga/shinyuu_ni_sukina_hito_ga_dekitarashii/
https://www.mangago.me/read-manga/big_love_from_ultra_deep_space/
https://www.mangago.me/read-manga/hanamonogatari/
https://www.mangago.me/read-manga/yearning_for_a_night_full_of_you/
https://www.mangago.me/read-manga/the_heart_of_the_thorns/
https://www.mangago.me/read-manga/tsumugi_chan_wants_to_make_seto_san_laugh/
https://www.mangago.me/read-manga/furetai_wa_koi_no_hajimari/
https://www.mangago.me/read-manga/kimi_ga_hoeru_tame_no_uta_wo/
https://www.mangago.me/read-manga/the_subjugation_school_life_of_the_corpse_girl_and_the_love_heavy_knight/
https://www.mangago.me/read-manga/girlfriend_limited_to_7_days/
https://www.mangago.me/read-manga/oni_ure_idol_ga_kyou_mo_watashi_wo_oshitekuru/
https://www.mangago.me/read-manga/foxes_always_lie/
https://www.mangago.me/read-manga/adachi_to_shimamura/
https://www.mangago.me/read-manga/koharu_to_minato_watashi_no_partner_wa_onna_no_ko/
https://www.mangago.me/read-manga/mietemasu_yo_aizawa_san/
https://www.mangago.me/read-manga/love_gives_me_superpowers/
https://www.mangago.me/read-manga/my_ex_girlfriend_became_my_boss/
https://www.mangago.me/read-manga/unnie_i_like_you/
https://www.mangago.me/read-manga/wicked_spot/
https://www.mangago.me/read-manga/akumade_amai_watashi_no_kanojo/
https://www.mangago.me/read-manga/tsumetakute_yawaraka/
https://www.mangago.me/read-manga/genjitsu_sekai_real_demo_shiawase_ni_shite_kudasai_ne/
https://www.mangago.me/read-manga/koi_yori_aoku_oneshot/
https://www.mangago.me/read-manga/ano_koro_no_aoi_hoshi/
https://www.mangago.me/read-manga/listening_to_the_stars_bbl_scans/
https://www.mangago.me/read-manga/muryoku_seijo_to_munou_oujo/
https://www.mangago.me/read-manga/kiraware_majo_reijou_to_dansou_ouji_no_kon_yaku/
https://www.mangago.me/read-manga/the_song_that_transcends_this_world/
https://www.mangago.me/read-manga/anata_mitai_ni/
https://www.mangago.me/read-manga/ano_ko_to_futari_de/

Angst:
https://www.mangago.me/read-manga/tower_of_campanella/
https://www.mangago.me/read-manga/kimi_ga_shinu_made_koi_wo_shitai/
https://www.mangago.me/read-manga/a_monster_wants_to_eat_me/
https://www.mangago.me/read-manga/artificial_temperature_36_7_c/
https://www.mangago.me/read-manga/have_a_great_trip_after_the_credits_roll/
https://www.mangago.me/read-manga/the_montfort_royal_family_s_scandal_athrea_scans/

Smut:
https://www.mangago.me/read-manga/asumi_chan_is_interested_in_lesbian_brothels/
https://www.mangago.me/read-manga/does_it_count_if_your_first_time_is_with_an_android/
https://www.mangago.me/read-manga/drunken_my_boss/
https://www.mangago.me/read-manga/love_only_the_body/
https://www.mangago.me/read-manga/trash_flower/
https://www.mangago.me/read-manga/please_pick_my_love_too/
https://www.mangago.me/read-manga/murmur_temple_scan/ (dub-con)
https://www.mangago.me/read-manga/only_to_you/ (BDSM)

Thank you everyone!