check out older makjangs like East of Eden , The Equator Man, The Innocent Man , Shining Inheritance
If you liked The Penthouse check out the writer's previous dramas like The Last Empress & Come! Jang Bo Ri. I've completed Five Fingers and barely watched Band of Sisters/Temptation of Wife but those 2 were the most addicting ones for me.
If you liked SKY Castle and TWOTM I also recommend Woman of Dignity and My Dangerous Wife (remake of a J-drama)
some 100+ episodes daily dramas that air in a specific time slot are usually the revenge/makjang ones (they resemble those of soap operas but some of the ones I've watched were pretty addicting even though they were rated low here). Check out this list https://wiki.d-addicts.com/List_of_Dramas_aired_in_Korea_by_KBS2#KBS2_Monday_to_Friday_Evening (6:50 PM / 7:45 PM) I'm watching Yellow Boots right now but the first few episodes seemed fast paced/grabbed my attention.
Makjang family dramas - Man Who Sets the Table , A Hundred Year's Inheritance (these 2 are rated low on MDL but I found them addicting)
lakorns that resemble makjang dramas - Hua Jai Sila , The Fallen Leaf, Sorn Ngao Ruk
