Question: Which US Army Ranger is best known for his actions during the 2012 terrorist attack on the US Ambassador in Benghazi?

Context paragraphs:
Ryan Cleckner: Ryan Cleckner is a former Army Ranger sniper and instructor with the 1st Ranger Battalion of the US Army.  He is currently an attorney, competitive shooter, and author of the Long Range Shooting Handbook.

Kris Paronto: Kris "Tanto" Paronto is a former U.S. Army Ranger, CIA security contractor, author and speaker.  He is best known for his actions as part of the CIA annex security team during the 2012 terrorist attack on the U.S. Ambassador to Libya Chris Stephens and the CIA compound in Benghazi.  He is featured in the book "13 Hours: The Inside Account of What Really Happened in Benghazi" and credited as co-author as part of the security team.  He was portrayed by Pablo Schreiber in the 2016 .  Paronto is also the author of "".

United States House Select Committee on Benghazi: The United States House Select Committee on Events Surrounding the 2012 Terrorist Attack in Benghazi was created after Speaker of the United States House of Representatives John Boehner, on May 2, 2014, proposed that a House select committee would be formed to further investigate the Benghazi attack on September 11, 2012.  During that event, the U.S. diplomatic mission in Benghazi, Libya was attacked, resulting in the deaths of the U.S. ambassador to that country, J. Christopher Stevens, and three other Americans.  On May 8, 2014, the House voted 232–186 to establish the select committee, with 225 Republicans and 7 Democrats in favor, and 186 Democrats voting against.  The chairman of the committee is Representative Trey Gowdy from South Carolina.

75th Infantry Regiment (Ranger): The 75th Infantry Regiment (Ranger) (officially 75th Infantry Regiment or 75th Infantry) was initially a parent regiment for all the US Army Ranger units during the Vietnam War and the early 1980s and then the headquarters for the Ranger battalions.

Rafallah al-Sahati Brigade: The Rafallah Sahati Brigade is named after one of the first Libyans to die while fighting Gaddafi's forces in March 2011 in Benghazi.  The group began as a battalion of the 17 February Martyrs brigade, before expanding to become a group in its own right.  Its members are estimated at 1,000 with presence in eastern Libya and in Kufra.  The brigade took part in securing the national elections and other Ministry of Defence operations in eastern Libya.  It has denounced the killing of the US ambassador in Benghazi.

2012 Benghazi attack: The 2012 Benghazi attack refers to a coordinated attack against two United States government facilities in Benghazi, Libya by members of the Islamic militant group Ansar al-Sharia.

13 Hours (book): 13 Hours: The Inside Account of What Really Happened in Benghazi is a 2014 historical book by American author Mitchell Zuckoff that depicts the terrorist attack by Islamist militants at the American diplomatic compound in Benghazi, Libya on September 11, 2012.  The book is an account from the point of view of the compound's defenders, and does not address any of the political controversy surrounding the attacks.  The book was later adapted into a directed by Michael Bay in 2016.

Eighth Army Ranger Company: The Eighth Army Ranger Company, also known as the 8213th Army Unit, was a Ranger light infantry company of the United States Army that was active during the Korean War.  As a small special forces unit, it specialized in irregular warfare.  Intended to combat the North Korean (NK) commandos who had been effective at infiltration and disruption behind United Nations (UN) lines, the Eighth Army Ranger Company was formed at the height of the Battle of Pusan Perimeter in September 1950 and was the first U.S. Army Ranger unit created since World War II.  The company went into action as a part of the 25th Infantry Division during the UN advance into North Korea in October and November.  It was best known for its defense of Hill 205 against an overwhelming Chinese attack during the Battle of the Ch'ongch'on River which resulted 41 of the 51 Rangers becoming casualties.

Cameron Munter: Cameron Phelps Munter (born 1954) is CEO & President of The EastWest Institute, a non-governmental organization that focuses on conflict resolution, based in New York.  A former American diplomat and career foreign service officer, he was the US Ambassador to Pakistan, from 2010-2012, and previously the US Ambassador to Serbia.  Prior to joining the Foreign Service, Munter taught European history at the University of California Los Angeles, and also taught at Columbia University School of Law.

James A. Helis: Dr. James A. Helis, Rear Admiral (United States Maritime Service), is the twelfth Superintendent of the United States Merchant Marine Academy.  A 1979 graduate of the United States Military Academy at West Point, New York, and a decorated Afghanistan War veteran, Helis served thirty years in the US Army, retiring at the rank of Colonel (United States Army).  In 2012, Helis was commissioned a United States Maritime Service Rear Admiral and appointed Superintendent of the United States Merchant Marine Academy by US Secretary of Transportation Ray LaHood.  Helis served his last eight years with the U.S. Army as an academic, culminating as Chair of the Department of National Security and Strategy at the United States Army War College, Carlisle, Pennsylvania.  Helis earned a Master of Arts in political science from the University of Pennsylvania, a Master of Military Affairs from the United States Army Command and General Staff College, School of Advanced Military Studies at Fort Leavenworth, Kansas, and a Doctor of Philosophy in international relations from the Fletcher School of Law and Diplomacy at Tufts University.  An airborne United States Army Ranger, Helis was awarded the Army Master Parachutist Badge.  Helis and his wife Jan have two sons, Dr. Corbin Helis, a physician and West Point graduate, and Ian Helis.

Supporting paragraphs: Kris Paronto 2012 Benghazi attack
Answer: Kris "Tanto" Paronto