Here are a couple that hopefully fit what you are looking for (In no particular order):
Yowamushi Pedal - http://www.mangago.me/read-manga/yowamushi_pedal/
Xian Ni - http://www.mangago.me/read-manga/xian_ni/
Tetsugaku Letra - http://www.mangago.me/read-manga/tetsugaku_letra/
Bremen - http://www.mangago.me/read-manga/bremen/
Cold Moon Chronicles - http://www.mangago.me/read-manga/cold_moon_chronicles/
Spirit Blade Mountain - http://www.mangago.me/read-manga/spirit_blade_mountain/
Battle Mexia - http://www.mangago.me/read-manga/battle_mexia/
Revival Man - http://www.mangago.me/read-manga/battle_mexia/
Meister - http://www.mangago.me/read-manga/meister_narak/
Arifureta Shokugyou de Sekai Saikyou -
http://www.mangago.me/read-manga/arifureta_shokugyou_de_sekai_saikyou/
Hello, is there any manga with a zero to hero kind of theme. Where a loser ends up being a genius at something or works really hard to become great. Something similar to:
King Golf
Eyeshield 21
Katekyo Hitman Reborn