Moonwalker_

You've described most of the manga on this site Anything more specific you're looking for? Action heavy? No harem? Villainous or heroic MC? Let's get down to the nitty gritty details!

Your homepages suggests that you mean both shounen with and without action, but in case I'm wrong I divided it.

shounen with action
https://www.mangago.me/read-manga/my_dad_is_too_strong/
https://www.mangago.me/read-manga/the_lord_s_coins_aren_t_decreasing/
https://www.mangago.me/read-manga/leveling_with_the_gods/
https://www.mangago.me/read-manga/worn_and_torn_newbie/
https://www.mangago.me/read-manga/legendary_youngest_son_of_the_marquis_house/
https://www.mangago.me/read-manga/i_log_in_alone/
https://www.mangago.me/read-manga/how_a_former_pro_takes_advantage_by_doing_an_easy_job/
https://www.mangago.me/read-manga/kill_the_hero/
https://www.mangago.me/read-manga/return_of_the_frozen_player
https://www.mangago.me/read-manga/world_s_apocalypse_online/
https://www.mangago.me/read-manga/i_obtained_a_mythic_item/
https://www.mangago.me/read-manga/steel_eating_player/
https://www.mangago.me/read-manga/return_to_player/
https://www.mangago.me/read-manga/archmage_transcending_through_regression/
https://www.mangago.me/read-manga/catastrophic_necromancer/
https://www.mangago.me/read-manga/apex_future_martial_arts/
https://www.mangago.me/read-manga/my_civil_servant_life_reborn_in_the_strange_world/
https://www.mangago.me/read-manga/the_beginning_after_the_end/
https://www.mangago.me/read-manga/academy_s_undercover_professor/
https://www.mangago.me/read-manga/the_reincarnated_assassin_is_a_genius_swordsman/
https://www.mangago.me/read-manga/the_hunter/
https://www.mangago.me/read-manga/kage_no_jitsuryokusha_ni_naritakute/
https://www.mangago.me/read-manga/the_s_classes_that_i_raised/
https://www.mangago.me/read-manga/solo_auto_hunting/
https://www.mangago.me/read-manga/re_life_player/
https://www.mangago.me/read-manga/regressing_with_the_king_s_power/
https://www.mangago.me/read-manga/sss_class_suicide_hunter/
https://www.mangago.me/read-manga/your_talent_is_mine/
https://www.mangago.me/read-manga/revenge_of_the_iron_blooded_sword_hound/
https://www.mangago.me/read-manga/the_live/
https://www.mangago.me/read-manga/volcanic_age/
https://www.mangago.me/read-manga/the_legendary_mechanic/

other shounen
https://www.mangago.me/read-manga/once_again_idol/
https://www.mangago.me/read-manga/this_is_the_law/
https://www.mangago.me/read-manga/my_second_life_as_an_idol/
https://www.mangago.me/read-manga/debut_or_die/
https://www.mangago.me/read-manga/judge_lee_han_young/
https://www.mangago.me/read-manga/medical_return/
https://www.mangago.me/read-manga/superstar_from_age_0/
https://www.mangago.me/read-manga/legend_reboot/
https://www.mangago.me/read-manga/1st_year_max_level_manager/
https://www.mangago.me/read-manga/saving_the_doomed_idols_with_my_touch/
https://www.mangago.me/read-manga/the_chaebeol_s_youngest_son/
https://www.mangago.me/read-manga/a_tidal_wave_of_glory/
https://www.mangago.me/read-manga/star_dream_idol_project/
https://www.mangago.me/read-manga/again_my_life/
https://www.mangago.me/read-manga/the_genius_idol_s_strategy_to_stardom/
https://www.mangago.me/read-manga/doctor_s_rebirth/
https://www.mangago.me/read-manga/my_daughter_is_a_musical_genius/
https://www.mangago.me/read-manga/the_second_life_of_an_all_rounder_idol/
https://www.mangago.me/read-manga/i_became_the_youngest_top_idol/
https://www.mangago.me/read-manga/mofumofu_to_isekai_slow_life_o_mezashimasu/
https://www.mangago.me/read-manga/reincarnated_as_an_aristocrat_with_an_appraisal_skill/
https://www.mangago.me/read-manga/return_of_the_legend/
https://www.mangago.me/read-manga/this_life_starts_as_a_child_actor/
https://www.mangago.me/read-manga/be_the_actor/

Try these!
https://www.mangago.me/read-manga/insecret_1/

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

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

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

https://www.mangago.me/read-manga/switch_1/

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

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

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

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

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

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

https://www.mangago.me/read-manga/once_again_idol/
https://www.mangago.me/read-manga/in_this_life_the_greatest_star_in_the_universe/
https://www.mangago.me/read-manga/my_second_life_as_an_idol/
https://www.mangago.me/read-manga/debut_or_die/
https://www.mangago.me/read-manga/the_genius_idol_s_strategy_to_stardom/
https://www.mangago.me/read-manga/acting_genius_top_idol/
manga/the_second_life_of_an_all_rounder_idol/
https://www.mangago.me/read-manga/i_became_the_youngest_top_idol/
https://www.mangago.me/read-manga/princess_ai/
https://www.mangago.me/read-manga/because_it_s_love/
https://www.mangago.me/read-manga/holy_idol/
https://www.mangago.me/read-manga/saving_the_doomed_idols_with_my_touch/
https://www.mangago.me/read-manga/imitation_park_kyung_ran/
https://www.mangago.me/read-manga/princess_ai/
https://www.mangago.me/read-manga/so_i_married_an_anti_fan/
https://www.mangago.me/read-manga/star_dream_idol_project/

BL
https://www.mangago.me/read-manga/koi_ni_wa_mukanai_shokugyou/
https://www.mangago.me/read-manga/in_my_closet/
https://www.mangago.me/read-manga/whose_baby_is_it/
https://www.mangago.me/read-manga/fanboy_and_robot_idol/
https://www.mangago.me/read-manga/hyung_you_re_my_idol/
https://www.mangago.me/read-manga/heat_x_beat_a_shut_in_omega_becomes_an_idol/

Damn thanks guys!