George Francis trained world champion Ugandan former professional boxer who competed from 1980 to 1991, and 1996 to 1999 and held the WBC super-welterweight title during what time period?
from 1989 to 1990
George Francis (trainer)
George Francis ("c." 1929–2002) was a British boxing athletic trainer who trained world champion boxers such as Frank Bruno, John Conteh, John Mugabi, and Cornelius Boza Edwards.
 He was found hanged at his home in London, apparently having committed suicide.
 He was 73.
John Mugabi
John Mugabi (born 4 March 1960) is a Ugandan former professional boxer who competed from 1980 to 1991, and 1996 to 1999.
 He held the WBC super-welterweight title from 1989 to 1990, and challenged twice for world titles at middleweight, including the undisputed championship.
 Mugabi was part of an exceptionally talented group of light-middleweights and middleweights during a "golden era" of the 1980s which included Marvin Hagler, Sugar Ray Leonard, Thomas Hearns, Wilfred Benítez, Davey Moore, and Roberto Durán.
 As an amateur, Mugabi won a silver medal in the welterweight division at the 1980 Summer Olympics, and was the only medallist for Uganda at the event.
Hasim Rahman
Hasim Sharif Rahman (born November 7, 1972) is an American former professional boxer who competed from 1994 to 2014.
 He is a two-time world heavyweight champion, having held the unified WBC, IBF, IBO, and lineal titles in 2001; and the WBC title again from 2005 to 2006.
 Rahman first became known on the world stage in 2001 when he scored an upset knockout victory against Lennox Lewis to win the unified heavyweight championship.
 Lewis avenged the loss and regained his championship by knocking out Rahman in a rematch later that year.
 Rahman won the WBC title (initially the interim version) for a second time in 2005 by defeating Monte Barrett, after which the WBC elevated him to full champion status by the year's end.
 His reign as champion ended in 2006 via another knockout loss, this time to Oleg Maskaev in a rematch of their first fight in 1999. Darkie Smith
John "Darkie" Smith (born 1942) is a British former boxer, now employed in boxing training and boxing matchmaking.
 By birth a Romany Gypsy, Darkie fought in the UK until the age of 30.
 He served an apprenticeship under the pro trainer George Francis before setting out on his own.
 Smith has worked as a trainer in the UK, France, Spain, Majorca, the USA and Germany.
 Fighters trained to world titles include heavyweight Herbie Hide, light heavyweight and cruiserweight Fabrice Tiozzo, super middleweight Christophe Tiozzo and light welterweight Stephen Smith.
 He has also trained European, Commonwealth and British champions, and worked with other future champions during the early stages of their careers.
 These fighters include European Heavyweight Champion Zeljko Mavrovic and future world champion Chris Eubank.
 Darkie's work with Mavrovic drew much attention.
 Mavrovic was trained exclusively by Smith for five years, winning and defending his European title and finishing with a record of one defeat in thirty bouts.
 The one defeat amounted to a points decision against world champion Lennox Lewis, in a bout that saw Mavrovic concede a significant weight advantage. Rafael Márquez (boxer)
Rafael Márquez Méndez (born 25 March 1975) is a Mexican former professional boxer who competed from 1995 to 2013.
 He is a two-time world champion in two weight classes, having held the IBF bantamweight title from 2003 to 2007; and the WBC, "Ring" magazine, and lineal super bantamweight titles in 2007.
 He also held the IBO bantamweight title from 2005 to 2007, and challenged once for WBO featherweight title in 2011.
 Márquez was known for his formidable knockout power and relentless pressure fighting style.
 His older brother Juan Manuel Márquez is also a professional boxer and multiple-time world champion. Gerry Peñalosa
Geronimo "Gerry" Peñalosa (born August 7, 1972) is a Filipino former professional boxer who competed from 1989 to 2010.
 He is a two-weight world champion, having held the WBC and lineal super flyweight titles from 1997 to 1998, and the WBO bantamweight title from 2007 to 2009.
 Originally from San Carlos City, Peñalosa currently resides in Manila.
 He was trained mainly by Freddie Roach, and went on to become a boxing trainer himself after retirement.
 Peñalosa's older brother, Dodie Boy Peñalosa, is also a former boxer and world champion. Freddie Roach (boxing)
Frederick Steven "Freddie" Roach (born March 5, 1960) is an American boxing trainer and former professional boxer.
 Roach is widely regarded as one of the best boxing trainers of all time.
 He is the enduring boxing coach of the eight-division world champion Manny Pacquiao, five-time and four-division World Champion Miguel Cotto, former WBC Middleweight Champion Julio César Chávez, Jr., defensive master and three-time world champion James Toney, former UFC Welterweight Champion Georges St-Pierre, as well as top prospects Jose Benavidez, Peter Quillin, and Vanes Martirosyan.
 Roach was the trainer of former two-time world champion and notable women's champion Lucia Rijker.
 He has also trained former junior welterweight champion Amir Khan. Mikaela Laurén
Mikaela Laurén (born 20 January 1976) is a Swedish professional boxer and former national team swimmer.
 In boxing she held the WBC female super-welterweight title from 2014 to 2016. Jorge Arce
Jorge Armando Arce Armenta ( ; born July 27, 1979), best known as Jorge Arce, is a Mexican former professional boxer who competed from 1996 to 2014.
 He is a five-time world champion, and the second boxer from Mexico to win world titles in four weight divisions (after Érik Morales, who first achieved the feat two months prior).
 In a storied career, Arce held the WBO light flyweight title from 1998 to 1999; the WBC and lineal light flyweight titles from 2002 to 2004; the WBO super flyweight title in 2010; the WBO junior featherweight title in 2011; and the WBO bantamweight title from 2011 to 2012.
 Additionally he held the WBC interim flyweight title from 2005 to 2006, the WBA interim super flyweight title from 2008 to 2009, and challenged once for the WBC featherweight title in his final fight in 2014. Anthony Mundine
Anthony Mundine (born 21 May 1975) is an Australian professional boxer and former rugby league player.
 In boxing he has held the WBA super-middleweight title twice between 2003 and 2008, as well as the IBO middleweight title from 2009 to 2010, and the WBA interim super-welterweight title from 2011 to 2012.
 Mundine is well known for his heated rivalries with fellow Australians Danny Green and Daniel Geale.