@GreenLunchBox
I agree with pps that the voice isn't everything. It does not make a star.
Lots of really famous, successful, talented pop stars/rock stars are not massively great singers. Madonna, Rihanna, Robbie Williams, Kylie, Kim Wilde, Rod Stewart, multiple girl and boy band members - to name but a few.
Even ADELE and Ed Sheeran aren't utterly brilliant, and Adele has a limited vocal range. But they have 'something,' a presence and a talent and have both cornered the market and given something that was missing at that particular time.
There is a LOT more to being a 'pop star.' You need to have magnetism, appeal, charisma, sass, confidence etc. Not just a good singing voice. Eg, Michele McManus who won Pop idol many years ago, had a strong voice, but she was as boring as fuck, and had zero stage presence.
Ditto Leon Jackson - a good singer, but intensely boring and dull, and nervous and shy on stage. It was such uncomfortable viewing watching Michele AND Leon. Also... Leona Lewis; good singer, very attractive, but had fuck-all natural stage presence, and was boring.
That's why Michele and Leon sank without a trace, and Leona didn't last long when Simon Cowell got bored with promoting her, because after about a year of it, he realised very few people were interested in her.
As for Elton. I think he's fucking brilliant. And so do MILLIONS of others. Do you think he'd still be kicking around after FIFTY YEARS in the industry, and would have sold millions and MILLIONS of records, and constantly sold out with his concerts and tours, if he was shit? Course he fucking wouldn't!