Complex sentence: After making excellent impressions with successful circus officials, Jewell rose through the ranks, and eventually landed himself as the leader of the Barnum & Bailey's Greatest Show on Earth band (coincidentially like Karl King, another successful American composer of his time).
Split into simpler sentences: After making excellent impressions with successful circus officials, Jewell rose through the ranks. He eventually landed himself as the leader of the Barnum & Bailey's Greatest Show on Earth band (like Karl King, another successful American composer of his time).