Q: Context: Elvis Aaron Presley (January 8, 1935 -- August 16, 1977) was an American singer and actor. Regarded as one of the most significant cultural icons of the 20th century, he is often referred to as the "King of Rock and Roll" or simply "the King".

Question: who is known as the king of rock?
Let's give stream of consciousness below
The relevant information to answer the above question is: Regarded as one of the most significant cultural icons of the 20th century, he is often referred to as the "King of Rock and Roll" or simply "the King". So the answer is Elvis Aaron Presley.