Who even knows what this question means? What is high ranking? Compared to what?
The most senior artillerists in each army were:
Henry J. Hunt was Chief of Artillery, Army of the Potomac.
William N. Pendleton was Chief of Artillery, Army of Northern Virginia.
One LTC, William Hayes, commanded a battalion of artillery in the 5th Corps.
Confederate artillery battalions were commanded by Maj John S. Saunders, Maj Bushrod W. Frobel, Col James B. Walton, Col Stephen D. Lee, Maj Alfred R. Courtney, LTC R. Lindsey Walker, Maj Lindsay M. Shumaker, Maj Scipio Pierson, Col J. Thompson Brown, LTC Allen S. Cutts, Major Hilary P. Jones, and Maj William Nelson. Capt John Pelham commanded the horse artillery.
All other artillery in both armies was commanded by a captain or below.