Shaman King (2001)

Isekai'd into another world, Haruka makes use of seemingly underpowered skills to live as a lone wolf.

Kurt Rockhans is a kind-hearted errand boy for a hero’s party, the Flaming Dragon Fang. One day, he's banished from the party and finds out he has the lowest rank in combat. In order to make a living, Kurt picks up various jobs and discovers he has astonishing abilities. Though he doesn't realize it yet, Kurt has SSS-rank skills in anything other than fighting, as he sets off on a new journey.

Noel is the grandson of legendary Seeker Overdeath and dreams of surpassing his strength. But it turns out that Noel is nothing but a Talker, the weakest class of them all. Undeterred, he uses his silver tongue to gather allies, develop cunning strategies, and form the greatest clan around. Now, as the most notorious Talker, Noel will do whatever it takes to claim supremacy.

Three months have passed since the Demon Lord was struck down, and the Demon Realm is holding a tournament to select his replacement. The leading contestant is Helck, a human hero who claims to hate his own kind. Some aren't happy with the idea of a human becoming the next Demon Lord—especially Vermilio the Red. She wants nothing more than to protect demonkind and prove Helck to be their enemy, even if she has to rig the competition to do it!

Rud, a shielder with a defense stat of 9999, serves as a tank for the Hero's Party as they carry out raids in labyrinths. When the tyrannical hero suddenly kicks him out of the party, saying his skill is "useless," Rud makes his way back to his hometown. Along the way, he saves a young girl, and she reveals the true nature of his skill... which turns out to be incredibly powerful!

After a life-changing incident, timid college student Koichi Haimawari accepts an offer from revered vigilante Knuckleduster to train as his protégé.

High-school student Amate Yuzuriha lives peacefully in a space colony floating in outer space. But when she meets a war refugee named Nyaan, Amate is drawn into the illegal mobile suit dueling sport known as Clan Battle.

Asakura Hana finds that being the son of Asakura You & Anna isn't all it's cracked up to be, and his boredom has him itching for any kind of excitement. But when a fight comes straight to his doorstep, it's from a place he least expects—his own family? The battle for Asakura supremacy begins!

Guideau is a young woman who was cursed by a witch, forced to carry a dark secret. Ashaf is a tall, soft-spoken man with a coffin strapped to his back and secrets yet untold. Together they venture across the land on their quest for vengeance. Appearances can be deceiving, and each step could be their last. In a dark fantasy filled with adventure, will unlikely heroes find the vengeance they seek?

An ordinary walk home from school turns into an epic journey for Usato. After suddenly being dropped into another world with two fellow students, Usato learns he was summoned there by accident. But things turn around when he discovers a unique aptitude for healing magic! Now, he trains beyond human limitations, using his self-healing abilities to gain absurd strength and unrivaled stamina.