Arsenal have had some transfer disasters over the years, but the premature sale of Andy Cole is one of their biggest-ever regrets. Cole came through the academy ranks at Arsenal as a bright talent, but only made one appearance for the club, before enduring a tough time under manager George Graham. The striker was accused of having attitude and arrogance problems, and he recently slammed the treatment he received from Graham and other senior Arsenal players and staff. Cole went on to move to Bristol City on loan in 1992, before leaving for good. It was there that he started to show his promise,…