Kenja no Mago
Current: Ch. 18. The guardians who taught the mc about some overpowered magic were famous powerful people. The mc doesn't have any common sense in regards to the world's average power and knowledge
Maken no Daydreamer
Ch. 16: I can only see this as a generic isekai story so far, but it is still entertaining tho
Kami-sama no Ekohiiki
Woah this is an interesting concept! A mix of shounen ai, shoujo ai, and shoujo! waw
Botsuraku Youtei Nanode, Kajishokunin wo Mezasu
The mc discovers that he was reincarnated as a side character from a game he played in his previous life. This character is fated to fall into ruin along with the villainess, thus spending their years together as a poor farmer. He wanted to avoid it at all cost, so he changes himself and studies a variety of useful skills that would help him earn money to avoid his fate of becoming poor.
Gaikotsu Kishi-sama Tadaima Isekai e o Dekake-chuu
Ch. 13: op skeleton knight on a journey
Isekai Nonbiri Nouka
Ch. 4: Isekai farmer
I Said Make My Abilities Average!
Ch 11.2: A girl reincarnated and asked God to make her powers average. Yet it seems that she has powers higher than humans. In order to avoid getting shunned, she is trying her best to hide her abilities and lead a normal life.
Murabito desu ga Nani ka?
Current: Ch. 10. A villager has a skill to reincarnate. With his past memories and experiences, he wanted to become stronger than the heroes, so that he can defeat the evil dragon to protect his beloved ones. I like the character growth in this manga, it's enjoyable; still kinda cliche tho.
Shikkaku Mon no Saikyou Kenja
Ch. 16.2: A powerful sage wanted to become more powerful, but because of his weak crest, he performed a reincarnation spell to get a better mark. I like it, it is really interesting and I am obsessed with op mcs
Sayounara Ryuusei, Konnichiwa Jinsei