The ones in bold, I recommend: All Rounder Meguru Basilisk Blood Rain Change Guy City of Darkness Dangu Dear Boy Dokgo Rewind Garouden Gwi History's Strongest Disciple Kenichi Hitogatana Honorable Baek Dong Soo Jackals Kengan Ashua Kento Ankokuden Cestvs King of Hell Kotaro Makaritoru Koukou Tekkenden Tough Kurogane Marchen - The Embodiment of Tales Mugen no Juunin Mujang NOW Player Kill Rainbow Rebirth Rurouni Kenshin Ryuurouden Sangokushi Shamo Shigurui Shin Kotaro Makaritoru Soul Cartel Sun Ken Rock (a bit mature) Tale of Eun Aran The God of High School Tough Ultra Red Veritas White Epic Witch Hunter Wu Dao Kuang Zhi Shi Yongbyeong Maluhan Yukikaze - Meiji Ishu Kakutouden Zero
since no one will say the most well-known one, I'll say it: 'dragon ball' 'tales of demons and gods' is by the same author as 'star martial god techique' 'teppu' is a good realistic one (though the ending was rushed)
Change 123 Dark Mage Ikkitosen Tenjou Tedge Souten no ken (Fist of the North Star prequel) Shura no Mon (and related series) Girls of the Wild´s Flame of Recca Zui Wui Dao Shigurui Veritas Zippy Ziggy Sumomomo Momomo