Complex sentence: Waters's influence is tremendous, not just on blues and rhythm and blues but on rock and roll, hard rock, folk, jazz, and country; his use of amplification is often cited as the link between Delta blues and rock and roll.
Split into simpler sentences: Waters's influence is tremendous, not just on blues and rhythm and blues but on rock and roll, hard rock, folk music, jazz, and country music. His use of amplification is often cited as the link between Delta blues and rock and roll.