Earl Simmons, the snarling, yet soulful rapper known as DMX, who had a string of albums in the late 1990s and early 2000s but whose personal struggles eventually rivalled his lyrical prowess, died on Friday in White Plains, N.Y. He was 50. His family announced the death in a statement. He had been on life support at White Plains Hospital after suffering what his family called “a catastrophic cardiac arrest” a week earlier. “Earl was a warrior who fought till the very end,” the Simmons family said. “He loved his family...