Bob, I don't know Justin Currie, but I can't hear the similarity between Roddy and Midge. I wasn't huge on Ultravox, though.
Anselm, I don't think you can copy harmonies, they just exist as a fact of nature, but you could try to copy melodies. (My Sweet Lord/He's So Fine) I don't think Jeff Lynne was trying to copy the Beatles in that respect. He was (or perhaps still is) a musical genius in his own way, and a fan of the Beatles, or at the very least of George Martin, but as this discussion is about his voice, I have to say it gave me that "feeling" when I was an adolescent.