Well, 'Solitary Lady' has some similarities in terms of art style and character depth.
You might like 'Love is an Illusion'. It shares the intense emotional undertones and complex relationships like 'Painter of the Night'. Also, the character development is quite engaging.
One manhwa that comes close to 'The Night Painter' is 'Starry Dreams' as both have elements of fantasy and a focus on the inner world of the characters. The storylines have some parallels too.
I'd recommend checking out 'True Beauty' and 'Lookism'. They have comparable elements of romance and drama as in 'Painter of the Night'.
I think 'Given' could be similar. It has a similar art style and emotional depth.
Try 'Starlight Whispers'. It has a similar atmosphere and plot elements. The way the characters interact and the emotional depth is comparable to 'Painter of the Night'.
Well, 'Solo Leveling' could be one. It has great art and an engaging story like 'Painter of the Night'.
Well, 'Dark Passion' and 'Sinful Encounter' could be considered similar. They both have complex character relationships and intense storylines like Immoral Night.
I'd say 'Sinister Tales' and 'Nightmarish Scenes' are comparable. They have similar art styles and explore similar horror elements as Dreadful Night. Both manage to build up tension and keep you on the edge of your seat.
I'd recommend 'Killing Stalking'. It has a similar dark and intense atmosphere like 'Painter of the Night'.
I'd recommend 'Parasyte'. It shares the creepy and thrilling aspects with Pumpkin Night. Both have unique storylines and intense moments.
They often have beautiful art styles and complex character relationships. The storylines tend to be engaging and full of drama.