Martin O’Neill is one of several legendary managers Celtic have had during their illustrious history and he is still regarded as an icon in Glasgow. The 72-year-old delivered seven trophies at Parkhead alongside famously leading the Hoops to the UEFA Cup final in 2003. Due to his exploits, O’Neill is regarded as one of the most influential figures in recent memory at Parkhead. He laid the foundations for the club to dominate Scottish football in the 21st century. Despite his last role in the dugout coming at Nottingham Forest circa 2019, there were rumours he could take over at Rapid Bucharest…