The Beatles considered reuniting

Several times, actually.  From Rolling Stone:

The Beatles had considered getting back together while all four members were still alive, says Paul McCartney. "There was talk of re-forming the Beatles a couple of times," he tells Rolling Stone, "but it didn't jell, there was not enough passion behind the idea."

According to McCartney, the band was very pleased with having come full circle creatively, and worried about tainting their legacy. "More importantly, it could have spoiled the whole idea of the Beatles, so wrong that they'd be like 'Oh, my God, they weren't any good,'" he says. "The re-formation suggestions were never convincing enough. They were kind of nice when they happened – 'That would be good, yeah' – but then one of us would always not fancy it. And that was enough, because we were the ultimate democracy."