Deathstroke

He is usually depicted as being among the deadliest and most expensive assassins in the DC Universe, and is a prominent enemy of several super-hero teams, most notably the Teen Titans, Titans, and the Justice League. He is also a prominent adversary to individual heroes such as Dick Grayson (as Robin and later Nightwing), Batman, and Green Arrow. Deathstroke is also the father of Jericho, two iterations of Ravager (Grant and Rose Wilson), and Respawn. A premier assassin, Deathstroke often comes into conflict with both members of the superhero community and his family, the latter whom he struggles to connect with.