EllisDream

I haven't seen all the shows you mention, but I'll add my comments to the ones I've watched:
- Cheese in the Trap – I'm convinced the leads aren't supposed to be likeable even by the end. I liked the show, but definitely more as a character study than as a romance or comedy. If it's comedy and empathy towards the leads you want, I suggest to either put this on hold or just drop it.
- I Hear Your Voice – this is my list of top favourite dramas of all time currently, but it's not exactly what I'd consider a comedy. While it has some funny moments, some situations are really sad. The FL is sort of unlikeable at first, but I ended up loving her.
- One More Happy Ending – I really liked this show, but yet again...it's (as you mentioned) a more realistic kind of humor that's somewhat bittersweet.
- Touch Your Heart – I got to episode 6, but I've just put it on my On Hold list yesterday. It's cute, but I can't find it compelling enough.

Personally I'd suggest trying the following if you haven't already:
- Chief Kim – if it's laughs you want, you'll get them here. And there's quite a bit of pretty as well. No real romance, but it might help you 'reset' from Goblin and Man to Man.
- Thirty but Seventeen – it has laughs and some depth as well. No lack of pretty either. While watching it felt like a fairytale. It gets a little slow in the middle but it wasn't anything I wasn't able to overcome...and I usually drop a show if I get bored.
- 100 Days My Prince and/or Shopping King Louie – the premise of these two dramas is so similar that the only difference might be just that the first is set in Joseon and the other in the present. They even both star Nam Ji Hyun as the main FL. I liked them both and they definitely do have comedy and pretty.
- Your Honor – This show is a guilty pleasure of mine. It has lots of faults but I found it funny, engaging and never boring. The controversial issue is that Yoon Shi Yoon overacts like crazy in this, to the point that it might be cringy. I personally just found him hilarious to watch, but it's definitely personal.

Oh dear...I want episode 9 right NOW!
I honestly can't figure out how this drama keeps being so unpredictable! It's such a refreshing feeling!

I'm eager to see how In Woo will manipulate Dong Shik into taking the blame for the killings now that he knows about the whole amnesia thing and I would never have thought we would get a fake love interest put into the mix as well.
Hopefully it'll help Bo Kyung becoming a more compelling lead. She's playing the 'straight guy' in a world of crazy people, so she ends up sadly being flat and a bit boring even if In Sun's performance is fine. Now she's turning out to be the only one having a 'real' emotional stake into the whole plot...but I'm partly scared that may just end making her less fun to watch...

I'm loving Heo Sung Tae in the gangster role! I think I've always seen him playing villains up till now and he's quite good, but I was surprised by his comedic style here and I'm finding myself rooting so much for his moments with Dong Shik.

I'm sadly in agreement about Bo Kyung. I honestly was expecting a little bit more from her character, but it's falling quite flat. I'm not hating her (as some others seem to do) but I'm not finding her compelling enough or very fun to watch. Hopefully her character will improve in the second half.

Never be said that I didn't try my best!
Anyway, I hope you'll give this show a chance. I honestly haven't seen anything quite like it up till now and it's a must if you like the dark comedy genre.

*cough*...I clearly said viewers, didn't I?!
Don't worry, join us...we got cookies :P

I suppose the ending might be considered on the happier side. It's not completely tragic at the very least.

Glad I managed to raise your interest :)

I hope it won't be too much of a deterrent, but while there definitely is some interesting chemistry and great interaction between the two MLs, I wouldn't exactly consider it a bromance...I was honestly a bit suprised at having seen it appear among the tags!
One thing for sure...most of the viewers are definitely rooting for it :P

I had dropped this long ago after the first episode and I was very hesitant to give it a second chance. Even the second time around the first episode didn't feel up to par with all the hype surrounding the drama, but as I went forward I could see what made so many people fall in love with it.
The writing is quite solid and the production value high. The acting ranged from good to amazing at times and the cast had so much chemistry that it was no wonder this title tops practically every list of "Best Bromance Dramas".
Yet, the main love story didn't amaze me and I could definitely have done with less of them both and more of the secondary couple.

Hello! I'm not claiming this info is mine since I haven't watched that movie, but according to DramaBeans it should be Memories of Murder.
Source: http://www.dramabeans.com/2019/11/psychopath-diary-episode-1/

Agreed!
Stranger 2 is definitely on my list of most anticipated for 2020 and probably in first place as well :P

It depends?
Personally I'm finding this drama to be great! It even pushed me to write an article here even if it has been about 10 years since I've tried writing anything that wasn't a business email...
But I can understand that it's not for everyone...I think some partiality for dark comedy is required to enjoy it.

For the story I do not have any suggestion, but there is one drama that I find had a similar black comedy vibe, even if only in the first few episodes, and that is I Picked Up a Star on the Road.
IPUSR (sadly) becomes more of a standard rom-com after 5 episodes, but the first 5 were all misunderstanding, a good dose of stupidity and dark humour. I found it a decent show overall, but for now it's quite a bit inferior to Psychopath Diary.

I found episode 5 pretty good but a bit weaker compared to its predecessors, but episode 6...episode 6 was AMAZING!

Agreed, the setup in the first episode took a while and it was a bit painful to watch...I wasn't too bothered by it because I sort of looked forward to see him change xD

I also hope romance is out of the picture. I wouldn't mind too much if it was kept very VERY light, but I'd definitely prefer it would become just a friendly collaboration.

Thank you :)
I had to rewatch that scene dozens of times to capture that gif correctly...but I could definitely watch it one hundred more :P

I'm not sure if it was said out right, but I'm confident the man the FL hallucinates about is her father. That's how she remembers her father was before he got brain-damaged during a case he pursued alone a few years before the start of the drama.
I think it represents her wish to follow in her father's steps and be a detective, a dream which she seemed to have pushed aside after his accident.

Sorta...A tiny bit? :P

Dear, I wouldn't be able to live without Viki nowadays!

I'm really kind of too lazy to try and learn a new language, even if I should at least try...with the amount of dramas I watch I guess the vocabulary would built itself if I only could really distinguish what the characters said.
One of the issues I found back when I was a teenager (...omg that was so LONG ago now that I think about it!) and I wanted to learn Japanese is that Asian languages are rarely straightfoward so it's not only the issue of understanding the words but actually interpreting them in the correct manner according to the situation.

True that. The drama till now has been light enough and it would sure turn darker (and in a very likely 'bad ending') in an instant if they would indeed take that route.
In this drama pretty much no one among the more active characters has been entirely a good person...I mean, even Bo Kyung and her police officer colleague pushed the blame for their car accident on the amnesiac victim in fear of losing their jobs xD

Lucky you for being able to understand Korean! I'll have to wait for Viki. I gotta say though that the translating volunteer team is doing a very fast and awesome job on this drama!