Dylan to me is kind of like Donald Fagen....You cannot possibly imagine anyone else singing any Steely Dan song than Fagen.....but of course I wouldn’t say that Fagen is that great of a signer...but his voice just has that right personality to match the lyrics.
There is a handful of Dylan tunes that can stand being sung by others. A handful, which doesn’t include “Like a Rolling Stone”, which the namesakes just couldn’t pass by, and had to record wretchedly imitating Dylan and Al Kooper. Go figure.