They did. The album was called Other Voices. It wasn't well-received.
A co-worker once said, "I don't understand why Bob Dylan is considered a legendary singer." Another person responded, "He's not a legendary singer; he's a legendary songwriter." I'd say the same of Jim Morrison's contribution to The Doors.
As far as AC/DC is concerned, Bon Scott co-wrote most of their really good songs. Back in Black was a good post-Scott album, but every album after that was simply a recycled version of Back in Black. Even Angus admitted that when he told a reporter, "I'm sick and tired of people saying that we put out 11 albums that sound exactly the same. In fact, we've put out 12 albums that sound exactly the same."