Want to read a manga like this

Well One Punch Man comes to mind right away if you aren't already reading.

Freezing Is pretty shounen-ish but with girls and enough ecchi to make it a seinen.

Seikon no Qwaser Is very shounen like, again, except for the ecchi / almost porn.

Aiki is pretty much a shounen battle manga with seinen touches (especially how the MC really IS an asshole).

Needless has a lot of shounen elements, like magic battles, and a Kamina-esque MC, but is also more violent and less moral. It's a pretty fun series, I definitely recommend it if you haven't tried it.

Hope that helps.

Hoshi no Samidare (Lucifer and the Biscuit Hammer) is the first that comes to mind. It was published as seinen but it follows, at least superficially, most of the shonen formula.

Maybe also check Abnormal-kei Joshi. It's a harem manga (classic shonen trope) turned on its head, with a bunch of insane characters as love interests. It's been in hiatus for years now, but it's still interesting to read.