Conversation so far:
What did Jerry Lee Lewis have to do with Sun Records?
In November 1956, Jerry Lee Lewis traveled to Memphis, Tennessee, to audition for Sun Records.
Did Jerry Lee Lewis pass the audition for Sun Records in November 1956?
In December 1956, Jerry Lee Lewis began recording prolifically, as a solo artist and as a session musician for other Sun artists.
What Sun Records artists did Jerry Lee Lewis record as a session musician for?
Jerry Lee Lewis began recording prolifically, as a solo artist and as a session musician for other Sun artists, including Carl Perkins and Johnny Cash.

Question: What was his greatest accomplishment?
Self-contained rewrite: What was Jerry Lee Lewis' greatest accomplishment?