I've been swimming in the romcom mayonese for far too long and looking for something that would even make Rambo cry. 

Open to all suggestions. 

too lazy to check your list, so sry if you already watched them

http://mydramalist.com/312-mother
http://mydramalist.com/2-1-litre-of-tears-2005


edit: didnt notice your post is in "Korean Dramas, Movies & Variety shows." so i recommended jp ones, do whatever you want with it
Dramas:

Reply 1988 - Even though the drana is very heartwarming, the ending had me bawling like a baby!
Autumn Tale
East Of Eden- Even the men cry buckets of tears in this one!
The Snow Queen


Movies:

May 18
The Classic


Sorry, I love you and Marriage Contract (still airing)
Thanks a lot, guys! I now got enough drama to keep me crying for the next month. 

 @CherryBunny Do I need to watch the second reply to watch 1988?
Maybe, 49Days and Deep Love ^^
1 liter of tears is too sad ... I think i really cried 1 liter T.T
Moon Embracing the Sun. It's a historical romance k-drama. This one had me crying in almost like every episode. 
@Ettie: Not really. There are a couple of cameos from Reply 1994 that show up, but there isn't an outright spoiler.
Stairway to Heaven - A real tearjerker

And a movie I saw yesterday: Hope
To me Goong was incredibly sad
Signal................. or Cruel City 
Definitely "Missing You".
Agree with "The Moon That Embracing The Sun"
Movies:
"A Moment to Remember"
"Daisy"
"The Crucibles"
Although it's Japanese, "1 Liter of Tears" was indeed a drama to cry each episode and make you think and appreciate the things you have.