1. The Wonderful Adventures of JOJO
JOJO also belongs to the fighting anime, and is very popular in the b station, but compared to the "Fist Wish Asura" and "Blade Tooth" JOJO, the grid skills in JOJO are also imagined by the author, such as stand-ins, ripples, which are all the author's self-created fighting skills.
2. "The Strongest Disciple in History"
"Kenichi" and "Blade Tooth" and "Fist Wish Asura" belong to the same type of fighting comics, which is more in line with your requirements. But "Kanichi" is a spin-off.
3. "One Punch Man"
It's a fun anime. The protagonist Saitama Sensei is too aggressive, often gets the opponent with one shot, just like the name of the manga, is a veritable "one-punch superman". Dealing with most enemies can be easily done with only "normal punches", "continuous ordinary punches" or "two-handed continuous ordinary punches", and its killer skill is "serious series".
4.《MEGALO BOX》
The anime is adapted from the boxing manga "Tomorrow's Father", which tells the story of the future boxing match that integrates the flesh and "armor technology", the protagonist of the anime grows from a "lost dog" step by step and finally becomes the "king of boxing".
5. "The First God Fist"
It tells the story of Ichigo, a teenager who runs a fishing boat and is always bullied, and meets Takamura Mori, who later became the world champion, and starts a life of boxing.
Obviously, this is a work of competition + boxing. It is mainly characterized by a careful depiction of the battles between companions and opponents.