Who did Elvis Presley say was "the greatest singer in the world," Barry Gibb say had the "voice of God," and Bob Dylan say "(his voice) made you want to drive your car off a cliff"?

From the stage in Las Vegas in 1976, Elvis Presley called Orbison "the greatest singer in the world", and Barry Gibb of the Bee Gees referred to him as the "Voice of God." Multiple Academy Award–winning songwriter Will Jennings ("My Heart Will Go On," from the Titanic soundtrack) called him a "poet, a songwriter, a vision," after working with him and co-writing "Wild Hearts." Bob Dylan, later a bandmate of Orbison's in the Traveling Wilburys, wrote "Orbison … transcended all the genres. … With Roy, you didn't know if you were listening to mariachi or opera. He kept you on your toes. … his compositions in three or four octaves that made you want to drive your car over a cliff. He sang like a professional criminal. … His voice could jar a corpse, always leave you muttering to yourself something like, 'Man, I don't believe it.' His songs had songs within songs. Orbison was deadly serious–no pollywog and no fledgling juvenile. There wasn't anything else on the radio like him."