Brian May collaborated with numerous artists during his career, but there's one artist he really wishes he could have worked with—the late John Lennon.
Brian told The Guardian, “I very seldom turn down a collaboration. A regret is that I didn’t get the chance to work with John Lennon.”
He added, “The Beatles didn’t always agree, they were always pulling and pushing – a bit like us and Queen – and I think John would be such a stronger pusher and puller. You’d have to work really hard to keep up, to believe in your instincts. I could imagine us hitting it off.”
May — who did share the stage with Paul McCartney when Queen performed at Live Aid in 1985, and who was asked, but later declined, to be part of Ringo Starr's All Starr Band — also said George Harrison and The Beatles were very influential:
"George Harrison, who's very much underrated, you know, his stuff was part of that whole tapestry that they wove. I think he's very influential in people, although they don't realize it. I love The Beatles' material. I think it's wonderful and irreplaceable, you know. We sat and listened to that 'White Album' for hours and hours and hours and thought, 'My God, just give us the chance to get in there with that technology and do our stuff.' We were already recording bits and pieces but we didn't have the control or the freedom."
[Source: Classic Hits Today]