"I just think some of you get caught up in the songs rather then the actual singing part."
Have you listened to "Phantom of the Opera"? Would you conclude that it's musical numbers are some of the hardest to perform? While Crawford starred in and defined the role for anyone else to follow behind him, Paul Stanley did to his credit and talent a magnificent job during his run in Toronto.
http://www.extreme-online.com/features/26/26a.htm
I'm basing it on talent, not how he looks or acts. He has the hair on the back of your neck raised. If you can find a copy of his performance(usually at Kiss Expos)by all means buy it. You will not be disappointed.
It took a lot of guts to take on the role, but it wasn't just some publicity gimmick to put people in the seats. It's been a passion of Paul's to do opera, but his Kiss commitments take up most of his time, well that and his charity work.
As far as Dio...go back to Rainbow and his early solo material as well as his stint with Black Sabbath...he can wail a tune out there and keep a note for a sustained period.