Speaking on Rio Ferdinand's Vibe with Five podcast, Gill said: "The top three signings, I would say, would be Wayne (Rooney) in terms of what he did for the club. 

I would say Michael Carrick for what he brought in terms of all that. And the third I would say, well I can have two. There’s a lot. [Nemanja] Vidic and [Patrice] Evra."

He added: "But I think in terms of the importance to the club, one of the most important ones was Edwin. We struggled to replace Peter (Schmeichel) and then we went out and got Edwin and he was great for us."

While Gill did not consider Ronaldo's transfer in his list, it has to be noted that the first time the Portuguese joined the club was a month before he officially took charge as the club's CEO. 

Ronaldo left United in 2009 to join Real Madrid and then returned to Old Trafford 12 years later in 2021. Midway into the 2022-23 season.