Which fourth highest scoring ace in aviation history flew with the "Jagdgeschwader" 54?
Jagdgeschwader 54:  JG 54 flew on the Eastern Front claiming over 9,600 aircraft shot down, with pilots such as Walter Nowotny, Otto Kittel, Hans-Ekkehard Bob, Max-Hellmuth Ostermann and Hannes Trautloft being termed "Experten". Otto Kittel:  He flew 583 combat missions on the Eastern Front, claiming 267 aerial victories, making him the fourth highest scoring ace in aviation history according to authors John Weal and Jerry Scutts.
Otto Kittel