Just finished watching Inuyashiki (11 episodes)
Inuyashiki is a pretty good anime, perhaps one of the best of the Fall 2017 season.
An old man and a young man are on a hill, when an alien ship crashes, killing them. The aliens rebuild them, but all they have are weapons units. Now, back alive, the old man uses his powers to save people, while the young man becomes a serial killer.
The artwork and animation are excellent, the storyline is original, and the characters are well developed.
If you haven't seen Inuyashiki, check it out!
BTW, the OP is My Hero, by Man with a Mission.