From an interview a few years back, Bod Dylan testifying…

“….Hard to find a better singer than [John] Lennon was or McCartney was and still is. I mean I’m in awe of McCartney. He’s about the only one that I am in awe of. But I’m in awe of him. He can do it all and he’s never let up, you know. He’s got the gift for melody, he’s got the rhythm. He can play any instrument. He can scream and shout as good as anybody and he can sing the ballad as good as anybody, you know so… And his melodies are, you know, effortless. That’s what you have to be in awe… I’m in awe of him maybe just because he’s just so damn effortless. I mean I just wish he’d quit, you know. [laughs] Just everything and anything that comes out of his mouth is just framed in a melody, you know …”
Bob Dylan

Testify Bob… Testify!