Full metal alchemist or Full metal alchemist brotherhood.
Though I suggest reading the manga first before watching either since FMA doesn't follow the manga and First 13 episodes of FMAB are too fast since they were remaking the series with manga version.
You must be registered for see links
and Beelzebub are entertaining too.
Hunter x Hunter has some similarities but it's more like OP in story treatment than Naruto. However fights and character techniques are more fleshed out than Naruto at times with a lot of explanation if you like that part. And it's kind of indefinite hiatus for a long time so you can skip the last arc for now if you don't like the unfinished arcs.
If you are in to manhwa- then The breaker and the breaker new waves and The ruler of the land, Noblesse etc may work for you.