Tokyo Ghoul, Kimetsu no Yaiba Recommendations
Ghouls and Demons fighting against humanity. Some of them are able to affect people and become demi-humans. Or so called - half human half demon/ghoul. Main character goes through traumatic incidents which changes his life. Both MC's are naive, into crying and having their perfect world which is soon broken and changed by the reality. Some good fights, action, soundtracks and animation.
-Both have a supernatural foe that antagonizes the human race, however they look like humans (or similar to them)
-Both shows try to get you to sympathize with this foe by making it seem like it was out of their control or they had no choice but to do what they did
-Both see a main character transformed into that man-eating creature after a horrible accident
-Both follow the main character's journey to mature as he is suddenly subjected to a harsh turn of events in his life and fails to adapt quickly
Kimetsu no Yaiba and Tokyo Ghoul are vastly similar in both a tonal, literal, and plot-oriented sense. The plots are almost creepily similar, and if you enjoyed/valued the serious, dramatic, adrenaline-pumping, potentially disturbing, and mind-boggling experience of one of these shows, I can garuntee you will come to appreciate that of the other. :D
In both shows there are human eating creatures that have regenerative powers. Also in both shows there's a character that is a demon/ghoul but doesn't actually want to harm humans.
Both go under the same premise of man eating monsters and are very popular animes. They also have a middlemen between the two races, Nezuko being previously human but turned into a demon and Kaneki being a human and becoming half ghoul.
-they both eating humans
-nezuko to kaneki ken
About demons, many blood and fighting scenes, both have strong protagonists and antagonists.