OldMarioUncles
Yu Yu Hakusho. The old school battle shounen that the author of hunterXhunter first major success. Starts with some interesting ghost stuff and then veers more into a more traditional battle shounen including one of the best tournament arcs ever.
A guy gets sucked into an Isekai (what he thinks is a typical otherworld fantasy that he's read about) but despite being genre savy he painfully learns that it's not exactly like that. He doesn't get cheat codes to make him powerful and beloved like in those wish fulfilment books/anime he consumed. If he wants a better life then the one he gladly left behind he will have to put in effort and improve himself. Luckily (or unluckily) he will get multiple chances as he has received power of time looping after his (usually extremely painful) deaths.
- Loneliness/body horror, Adventure, fun time
A Place further then the Universe. An incredibly inspirational story of four teen girls who decide to go to Antarctica. Other then dealing with grief this doesn't have anything upsetting. Just the ultimate feel good motivation show.
It's all a conspiracy. Sato is a college dropout neet/hikomori (not in education employment or training due/acute social withdrawal. Also easily addicted and very conspiratorial in part due to an old HS crush). A mysterious high school girl appears one day and declares she wants to save him from his lifestyle for her own selfish and mysterious reasons. That is the start to a very dark journey as he attempts to recover but on the way stumbles into a lot of troubling japanese social trends.
Monster. The actions of a well meaning Japanese surgeon unleash a monster on the world, the doctor travels around post communist Germany and Czechoslovakia going deeper and deeper into the mystery of the Monster and looking for a way to stop him. But can he do what is necessary even if it breaks the Hippocratic oath?