WhaNskY

This one he's smart and was a pharmacist, so he knows how to take care of his cycle and everything. Not too fan of the ML though..
This one is still ongoing (but they upload very rarely).

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


This one I'm not sure if he can take care of his cycle (don't know if they had that in that time), but the omega is very smart, leads people and a can fend for himseld when is needed. ML is a green flag too.
This one is complete.

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


In this one omegas are at the top of the social pyramid instead of alphas.
It's complete.

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

In this one the omega is a badass and works as a bodyguard.
In the begging he did made a mistake and had a child, but now he keeps everything under control with the pills (he's pretending being a beta).
It's ongoing.

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

This one also has a smart omega, he actually cares too much about his cycles and pheromones and takes a lot of pills. He isn't strong physically, but yes mentally (when is needed, e.g. if he's being verbally attacked).

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

In this one the omega also is smart, knows how to take suppressants and can defend himself and even bosses around the alpha (although the alpha is actually his boss at work).
It's ongoing, but i think will end soon.

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

This one the omega is also smart and how to take care of himself. Initially very abused and controlled by his mother, but he gains freedom an power throughout the story.
It's still ongoing.

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

In here there are no approved pills for omegas, so he can't really control his cycle, but the omega is a total badass and bosses around the alpha and everybody else.
It's ongoing.

https://www.mangago.me/read-manga/the_golden_goose_dressed_as_alpha_boss/
Here the omega is a doctor of korean traditional medicine, so he takes care very well of his cycle and all that. He can fend for himself too, his just a little dense.
It's ongoing.

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

In this one the omega is smart, can take his pills and definitely can fend for himself and throw a punch when needed (even if it doesn't look like that at the beginning).
It's complete (there are 90 chapters, they are below the latest uploads).

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

Those are all i could remember/find in my archives that i had already read, so i could give a recommendation (:

Omg i hope your pillow stay cool all night long!

Oh, it doesn't show, but it was a heart with the hands hahaha hope some of them are to your liking (:

Enjoyyy ヾ(❀╹◡╹)ﾉ~
https://www.mangago.me/home/mangalist/1408361/

You are the best !!!