From the creator of "The 7 Deadly Sins", this is one of the most over the top battle mangas you'll ever read! Kongo Bancho is essentially a tournament style series with participants being Banchos (delinquent leaders). Akira Kongo is our leading hero who does not sway from his old fashioned convictions of honor & chivalry. His goal is to stop the conquest of Japan so he participates in the tourny, fighting against various martial arts & ludicrous opponents such as a giant shark, an android, hot blooded women, a giant cow, manly men & he even fights a mecha!!
Much is offered in this series as it also contains a main cast each with their own traits & convictions. Thankfully none of main characters are pushovers & neither are the villains. The two main enemies are Kongo's older brother & father being a throwback to the classic shonens of the 80's.
Being very testosterone heavy, Kongo Bancho displays muscular men & other tropes found in 80's MANIME. To balance out this series, there's also a few attractive looking women who also partake in battle. Aside from fights, the series contains over the top humor & surprisingly dramatic moments found in the flashback of the characters. Many other staples of shonen are featured as Kongo Bancho is a tribute to the classic themes of shonen being "Friendship, Effort & Victory" & excels at it!
Other recommendations would be Sakigake Otokojuku, Toriko, Fist Of The North Star, JoJo's Bizarre Adventure, Baki The Grappler etc. Sakigake Otokojuku is the closest in being similar as both partake in outrageous battles in highschool. XD
