If you meant manhwhas that has good writing it is... two, off the top off my head. mangas I can name a dozen off the top of my head easy. Most manhwhas I have stumbled into has been utter slop tho. Barring this manwha I can only think of one other manwha that I can call has good writing. It's called "Real Man" or "A Man's Man" its progression and writing is similar to this manwha in terms of progression and groundedness. it takes like unironically a dozen chapter to build up to a powerpoint presentation lol and its peak for it. Not as grounded as this manwha tho and slightly more gritty.
If you mean genderswap works in general, I can name "The Embodiment of Sins" as pretty cool, "Akuyaku Reijou Tensei Ojisan" and "J⇔M" for being very good comedic genderswaps, "Kuso Onna ni Sachiare" for romcom (a bit annoying with the will they or won't they!? drama), and "Mahou Shoujo Jihen" for a genderswap magical girl shtick played straight.
I'm going to shill my favorite "grounded' stuff while am at it (undeniably my kind of stuff). "Akuyaku Reijou no Naka no Hito", "MAOYU : Archenemy and Hero “Become mine, Hero” “I refuse!” ", The Dangers in My Heart and Kaguya-sama and to a lesser extent Oshi No Ko. Some of the ones i just spouted are really popular, some obscure but spouted them nevertheless
