I disagree, James is the voice of DT.
Just because the current trend is low and growling.
realize how long this band has been in existence.. Think about the vocalists that were happening then, Dio, Dickinson,Halford, etc..
James has an amazing range and voice. I realize he may not be your cup of tea but I am going to go out on a limb ans guess that the rest of the band like him.
I will also say this for him. I got a small glimpse into who he is as a person a few years ago.
I was early to a DT show in San Diego, I was walking past the load in door and there was this roadie trying to lift a case of this 6" dia power cable. Up walks James, he grabs the other side and lifts it with him. I thought how cool is that, he is the lead singer of a national act with a cult following and he helps the roadies. I gained a whole new respect for him that day.
When I saw him back stage I talked to him about it. He told me he was a roadie himself and has great respect for the job.