The MC is "reborn" as in awakaned into a new life after a close death experience going from an E rank hunter to a one that can grow.
MC is a neet that is summoned to another world by a summoner. He makes a contract with the summoner after showing the great power of anime, only to realize that it was real.
Another neet otaku that gets reaincarnated into a magic world. Being the otaku he is, he's interested in magic. But his peaceful life gets destroyed one day because of one big phenomenom that wipes out his whole city.
The MC's soul is transferred into another world and into an abandoned child. He starts a whole city with other abandoned children like him.
He gets reincarnated into a slime. He can consume everything and everyone and thus gain their abilities. He accidentally starts a city of monsters in a human-centric world after naming a couple of goblins.
He was summoned to another world when they were summoning three heroes to save that named world. He was the fourth one. With "food menu" skill. He starts adventuring and accidentally tames a slime, a legendary beast and... a god or a few depending on how you look at it.
He gets summoned as a hero by a god. The thing is, another god didn't want him so she gives him a curse, not being able to talk human languages.
His brother is dead. The only thing left of him is a watch that has his brother's memories in it. With the memories he can get a boost start on his revenge, because he knows the secrets of the "tutorial stage".
Not exactly isekai, but the MC starts dreaming of a very different kind of world that he quickly realizes is the future. A future that he wants to stop from happening.
Solo Leveling