Maxwell Braden "Max" Mittelman is a voice actor whose roles have in included a charcter who  has grown bored by the absence of challenge in his fight against evil and seeks to find what?
Max Mittelman: Maxwell Braden "Max" Mittelman (born September 5, 1990) is an American screen and voice actor who has provided voices for English-language versions of anime, as well as in video games and animated shows. Max Mittelman:  Some of his major roles include Saitama in "One-Punch Man", Kousei Arima in "Your Lie in April", King in "The Seven Deadly Sins", Ritsu Kageyama in "Mob Psycho 100", Inaho Kaizuka in "Aldnoah.Zero" and Ryuji Sakamoto in "Persona 5". One-Punch Man: One-Punch Man (Japanese: ワンパンマン , Hepburn: Wanpanman ) is an ongoing Japanese superhero parody webcomic created by an author using the pseudonym One which began publication in early 2009. One-Punch Man:  "One-Punch Man" tells the story of Saitama, an extremely overpowered superhero, who has grown bored by the absence of challenge in his fight against evil and seeks to find a worthy opponent.
a worthy opponent