I don't mind long dramas but is there one that doesn't have the same cliche plot , friend steals friend's husband and is wrongly accused then seeks revenge. Old or New as long as subtitles are there 

I can suggest "The Interest of Love", an authentic portrayal of relationships and life in general. 

Shining Inheritance 

Story of Yanxi Palace

New Tales of Gisaeng

I Have a Lover 

My Father is Strange 

Because of Meeting You