What are some must watch k-dramas from the past 3 years?

I haven't watched k-drama since 2014. What are some k-dramas since then that are must watches? 

DOTS (esp because SJK/SHK are getting married irl, spoiler alert) & Goblin for the cultural impact (not necessarily the quality for either). Reply 1988 for both cultural impact & quality (and really starting the 'Park Bogum becomes a giant star' thing).
Some popular watches considered musts by others:
Kill Me Heal Me
She Was Pretty
Strong Woman Do Bong Soon
Moon Lovers
Popular watches I consider musts:
SIGNAL
Age of Youth
Healer
It's Okay That's Love
Moonlight Drawn By Clouds
Oh My Ghostess 

2017:

Fight For My Way

Queen for Seven Days

The Guardians

Tunnel

Voice

Live Up to Your Name

2016:

Signal

The Legend of the Blue Sea

Weightlifting Fairy Kim Bok Joo

Descendants of the Sun

Moon Lovers: Scarlet Heart Ryeo

Bring It On, Ghost

Goblin

Marriage Contract

Something About 1 Percent

2015:

Kill Me, Heal Me

Oh My Ghostess

Oh My Venus

Mask

The Girl Who Sees Scents

2014:

Healer

Cunning Single Lady

It's Okay, That's Love

Marriage, Not Dating

The ones I've underlined are my personal favourites, but I've included others too.

2017:

• Tunnel
• Suspicious Partner
• Save Me
• Stranger
• Circle
• Chicago Typewriter
• Strong Woman Do Bong Soon
• Fight For My Way
• Live Up To Your Name
• Defendant
• While You Were Sleeping (airing)

2016:

• Moon Lovers: Scarlet Heart Ryeo
• Signal
• Shopping King Louie
• Weightlifting Fairy Kim Bok Joo
• Cheese in the Trap
• W

2015:

• I Remember You/Hello Monster
• Kill Me, Heal Me

2014:

• Healer
• Pinnochio

2014:

It's Okay, That's Love

2015:

Six Flying Dragons

2016:

Romantic Doctor Teacher Kim

Age of Youth

Signal

Weightlifting Fairy Kim Bok Joo

Another Miss Oh

2017:

Chicago Typewriter

Circle

Rebel: Thief Who Stole the People

Queen For Seven Days

Age of Youth 2

Live Up To Your Name

Woman of Dignity - pretty underrated

 Other dramas I enjoyed this year that's not listed here already: Missing 9, Reunited Worlds, Manhole

Thank for all the reccs.

Reply 1988

Empress Ki