Complex sentence: His records are a rich storehouse of the essential lyrical, showmanship and musical components of rock and roll; and, in addition to the Beatles and the Rolling Stones, a large number of significant popular-music performers have recorded Berry's songs.
Split into simpler sentences: His records are a rich storehouse of the essential lyrical, showmanship and musical components of rock and roll. In addition to the Beatles and the Rolling Stones, a large number of significant popular-music performers have recorded Berry's songs.