Elvis Presley
The 'King' started it all back in 1956 and was considered one of the most significant cultural figures of the 20th century. He was 'bad' enough to be loved by the young (me at the time) and talented enough to be loved by everyone else.

An amazing influence across the world.

Most influential songs for me were:
In the Ghetto, Heartbreak Hotel, Love me Tender, Suspicious Minds and of course Jailhouse Rock.