I’ve been trying to find something very similar to Glorious Day for literally so long but nothing is equally satisfying for me?

Basically, the drama can have makjang or melo moments but is mostly concentrated in being uplifting with a cast of wise or empathetic characters. Romantic couplings are a must — with a preference for at least one couple in their 20s (multi-couple is fine). If a wiser couple is at the center of thedrama, the 20s couple should still have a full trajectory (like Five Enough). I’d prefer if misunderstandings or false identities were not the main premise — more light/bright than melo, while not being a silly/slapstick comedy.

I don’t care which country it’s from even if I only listed Korean examples. A shorter form drama that fulfills this description is Go Ahead 
I actually didn’t love My Father is Strange or Once Again, in case those come to mind. I dropped What Happens to my Family, Wang’s Family & Family’s Honor but could potentially be willing to try them again at some point. 

Mare - I don't know if it similar to those mentioned by you, but it surely is uplifting. It is family comedy (no slapstic) drama with multiple couples and romances. It looks long, but episodes are short.

Maybe: https://mydramalist.com/2989-fermentation-family

To me as I remember it, it was like wearing a warm knitted glove in a cold winter when I watched it :)