#3 Luis Suarez
Despite having a good squad before signing Luis Suarez, the club returned empty-handed in the 2013-14 season. Things changed quickly once they signed Suarez.
He formed a formidable partnership with Lionel Messi and Neymar, dominating Spain and Europe for the next few years.
He registered 25 goals and 23 assists in the 2014-15 season, including netting one strike in the Champions League final against Juventus. Suarez went on to score 195 goals and laying down 113 assists in 283 games.
#2 Ronaldinho
Barcelona were in a poor state in the early 2000s. The team badly needed a messiah to lift them from their troubles. In the process of getting elected as club president in 2003, Joan Laporta promised fans he would sign David Beckham from Manchester United if he got the job.
Unfortunately, the plan was squandered by Real Madrid, who ended up signing the Englishman. Laporta instead compensated by bringing in Ronaldinho. It was seen as a backup alternative.
However, the Brazilian went on to become a club legend and a much bigger hit than Beckham did at Real Madrid.
He led the club to five honors in his five-year stint. It included one Champions League crown, two La Liga titles and two Spanish Super Cups. He also won the FIFA Player of the Year award twice and the Ballon d'Or once during his stay at the club.
#1 Johan Cruyff
Johan Cruyff delivered for Barcelona both as a player and as a manager. The Dutch genius joined the club for the first time from Ajax in 1973. He helped the Catalans break down Real Madrid's dominance in La Liga.
Cryuff then took charge as manager between 1988-1996, leading them to their first Champions League triumph in 1992. He also inspired the club to four La Liga titles, one Copa del Rey and three Spanish Super Cups as head coach.