Ces

hi i have a list on my profile that you might like! i’ve mentioned the ones that do have romance but i’m sure you’d find something that fits your taste!

https://www.mangago.zone/read-manga/omniscient_reader_s_viewpoint/
https://www.mangago.zone/read-manga/trash_of_the_count_s_family/
https://www.mangago.zone/read-manga/hunter_x_hunter/

Wait ORV has romance between side characters but MC doesn't have.

(I haven't caught up with/finished all of these, but from what I remember, there's no significant romance)
The Dark Magician Transmigrates After 66666 Years
Clover (tetsuhiro Hirakawa)
Phantom Tales of the Night
Mushishi
Totsukuni no Shoujo
I’m Not That Kind of Talent
Jujutsu Kaisen
When Night Falls
20th Century Boys
Jojo's Bizarre Adventure
One Piece

Sorry for the extremely long list
https://www.mangago.zone/read-manga/the_s_classes_that_i_raised/

https://www.mangago.zone/read-manga/mahou_shoujo_jihen/

https://www.mangago.zone/read-manga/seishun_x_kikanjuu/

https://www.mangago.zone/read-manga/gokurakugai/

https://www.mangago.zone/read-manga/gachiakuta/

https://www.mangago.zone/read-manga/saihate_no_paladin/

https://www.mangago.zone/read-manga/polarity/

https://www.mangago.zone/read-manga/ascendance_of_a_bookworm/

https://www.mangago.zone/read-manga/tongari_boushi_no_atelier/

https://www.mangago.zone/read-manga/saijaku_teima_wa_gomi_hiroi_no_tabi_o_hajimemashita/

https://www.mangago.zone/read-manga/fukigen_na_mononokean/

https://www.mangago.zone/read-manga/nanbaka/

https://www.mangago.zone/read-manga/tokyo_aliens/

Here dear, enjoy!
https://www.mangago.zone/home/mangalist/1608881/