Question: Which of Jamill Kelly's students ranks as the sixth best pound-for-pound fighter in the UFC? 

Context articles: Jimmy McLarnin
Max Holloway
Harry Greb
Manny Pacquiao vs. David Díaz
Joanna Jędrzejczyk
José Aldo
Jamill Kelly
Daniel Cormier
Luke Rockhold
Benny Leonard

James Archibald McLarnin (19 December 1907 – 28 October 2004) was an Irish-Canadian professional boxer who became a two-time welterweight world champion and an International Boxing Hall of Fame inductee.
 McLarnin has been referred to as the greatest Irish boxer of all time.
 BoxRec ranks McLarnin as the 11th best pound-for-pound fighter of all-time, the second best Canadian boxer of all time after Sam Langford, and the third greatest welterweight of all time.
Jerome-Max Kelii Holloway (born December 4, 1991) is a mixed martial artist from Waianae, Hawaii currently competing in the Featherweight division of the Ultimate Fighting Championship (UFC) where he is the undisputed UFC Featherweight Champion.
 As of September 2017, Holloway is the #4 ranked UFC pound-for-pound fighter.
Edward Henry Greb (June 6, 1894 – October 22, 1926) was an American professional boxer.
 Nicknamed "The Pittsburgh Windmill", he was the American light heavyweight champion from 1922 to 1923 and world middleweight champion from 1923 to 1926.
 He fought a recorded 298 times in his 13 year-career, which began at around 140 pounds.
 He fought against the best opposition the talent-rich 1910s and 20s could provide him, frequently squaring off against light heavyweights and even heavyweights. Widely considered one of the best fighters of all time, Greb was named the 7th greatest fighter of the past 80 years by the "Ring Magazine", the 5th greatest fighter of all-time by historian Bert Sugar and ranked as the #1 middleweight and the #2 pound-for-pound fighter of all-time by the International Boxing Research Organization.
 Statistical boxing website BoxRec lists Greb as the #3 ranked middleweight of all-time and the 8th greatest pound-for-pound fighter ever.
David Diaz vs. Manny Pacquiao, billed as Lethal Combination, was a lightweight title boxing match.
 The bout took place on June 28, 2008 at the Mandalay Bay, Las Vegas, Nevada, United States.
 Pacquiao defeated Diaz via technical knockout in the ninth round.
 The fight sealed Pacquiao's status as the best pound-for-pound fighter after he was elevated to the #1 spot because of the retirement of the undefeated five-division champion Floyd Mayweather Jr. weeks prior to the fight and put Pacquiao's name in the history books as the only Asian fighter to win five world titles in five weight classes.
Joanna Jędrzejczyk (] ; born August 18, 1987) is a Polish mixed martial artist and former Muay Thai kickboxer who competes in the women's strawweight division of the Ultimate Fighting Championship.
 She is the current UFC Women's Strawweight Champion and the third European (and only Polish) champion in UFC history after Bas Rutten in 1999 and Andrei Arlovski in 2005.
 As of May 2017, she is the consensus #1 female strawweight, and #1 pound-for-pound female MMA fighter in the world.
 She is also currently the #8 pound-for-pound fighter in the UFC mixed gender rankings, making her the top female on the list.
José Aldo da Silva Oliveira Junior (] ; born September 9, 1986) is a Brazilian mixed martial artist in the Ultimate Fighting Championship.
 He was the fourth and final WEC Featherweight Champion and thus, became the first UFC Featherweight Champion during the UFC/WEC merger.
 He is a former two-time UFC Featherweight Champion.
 He was named Sherdog's 2009 Fighter of the Year.
 He is currently #12 in official UFC pound-for-pound rankings, having been ranked as high as #1 in 2015, and ranked the #2 featherweight in the world and #7 pound-for-pound by Sherdog.
 In the decade from November 2005 through December 2015, Aldo was undefeated in 18 fights.
 In Sherdog's April 2017 Pound-For-Pound ranking, Aldo was called "the greatest featherweight in mixed martial arts history."
Larry Jamill Kelly (born October 25, 1977) is an American freestyle wrestler.
 He represented the United States at the 2004 Summer Olympic Games where he earned a silver medal.
 Up until August 2010 he was the head coach of Dallas Dynamite Wrestling Club in Dallas, Texas.
 In 2015, he became a guest wrestling coach for Daniel Cormier, Luke Rockhold and Cain Velasquez, all from the American Kickboxing Academy.
Daniel Ryan Cormier (born March 20, 1979) is an American mixed martial artist and former Olympic wrestler.
 He is the current UFC Light Heavyweight Champion, and is ranked as the sixth best pound-for-pound fighter in the UFC.
 Cormier was also the Strikeforce Heavyweight Grand Prix Champion.
 He is considered by many to be one of the greatest mixed martial artists of all time.
Luke Skyler Rockhold (born October 17, 1984) is an American mixed martial artist competing in the UFC, where he is the former UFC Middleweight Champion.
 He won the title on December 12, 2015 by defeating prior champion, the undefeated Chris Weidman via 4th round TKO.
 He lost his belt in his first title defense against Michael Bisping, who stepped in after Weidman pulled out of their scheduled rematch.
 A two-time world champion, Rockhold also won the Strikeforce Middleweight Championship by defeating Ronaldo Souza on September 10, 2011 via unanimous decision.
 Rockhold defended the title twice and was the last man to hold the belt, before Strikeforce was officially taken over by the UFC.
 He is currently ranked the #2 middleweight and #12 official pound-for-pound fighter by the UFC and other publications like Fight Matrix and Sherdog.
 Luke is also an avid surfer and skateboarder.
Benny Leonard (born Benjamin Leiner; April 7, 1896 – April 18, 1947) was an Jewish American professional lightweight boxer.
 Widely considered one of the all-time greats, he was ranked 8th on "The Ring" magazine's list of the "80 Best Fighters of the Last 80 Years" and placed 7th in ESPN's "50 Greatest Boxers of All-Time".
 In 2005, the International Boxing Research Organization ranked Leonard as the #1 lightweight, and #8 best pound-for-pound fighter of all-time.
 Statistical website BoxRec rates Leonard as the 2nd best lightweight ever, while "The Ring" magazine founder Nat Fleischer placed him at #2.
 Boxing historian Bert Sugar placed him 6th in his Top 100 Fighters catalogue.
 Leonard is a member of the National Jewish Sports Hall of Fame, the International Jewish Sports Hall of Fame, the Ring Magazine Hall of Fame, the World Boxing Hall of Fame, and the International Boxing Hall of Fame.