You have to rank your dramas that have completed from January 2019 to June 23rd. Currently airing dramas do not  count. But they could start ariring in 2018 and end in 2019.  Rank in order from worst to best 

sorry, i know u asked for in ranked order from worst to best, but its waaay easier to sort from best to worst.  (also, i would say these are my top 15, there's a bunch not on here that didnt cut the list...so none of these are the worst)  The criterea for me is purely which i enjoyed and looked forward to each week.    (Also Arthdal and My First First Love arent on here since they are really ongoing with S1 & S2 in same year)

1. sky castle
2. story of ming lan
3. memories of alharama
4. the legends
5. kill it
6. romance is a bonus book
7. tower of babel
8. her private life
9. confession
10. doctor prisoner
11. abyss
12. put your head on my shoulder
13. crowned clown
14. hajimete koi wo shita Hi ni Yomu Hanashi
15. item