Andy Dick "Monkeyman"
Andrew Roane Dick, better known as Andy Dick, is an American actor and comedian. He is best known for his eccentric and irreverent personality and was a regular cast member on the short lived sketch show The Ben Stiller Show. He was also a contestant on the eighteenth season of Dancing With The Stars. He also voiced Nuka in The Lion King II: Simba’s Pride.
He has been notorious and hated in recent years by the public for his drug addiction, his anti-semitic and racist statements, sexual harrasment and sexual assaults.
He is the voice of Monkeyman on Hey Arnold! (in "Monkeyman!") along with coincidentally sharing a similar appearence with the character (even though the character had appeared long before he voiced him).