Well, 'pop' as in 'popular' for the time. Not pop music as it's understood today with the type of sound a lot of pop music has.
Indeed, and he was a true genius, imo. Ngl, I wasn't keen on the big hits he had in the 1960's and later on. Basically those songs you just listed. His earlier stuff and the songs from his films are the ones I prefer. But he was genius. For me, he was.
I don't know if it was ever an official designation. Chairman of the Board and Ol' Blue Eyes are the titles that most people know. But he has (allegedly) sold more singles than Michael. He had a really successful film career, he won an Oscar and a Golden Globe. He started his own record label. I think by any reasonable measure he could be a contender for the title 'the king of pop'. Not that I care and I don't know if such a 'title' was ever used for him in his lifetime.
Here is the source for the claim re the record sales figures. No idea if this info is reliable but it is recent.
NJ's Sinatra, Elvis Or Michael Jackson: Who Is # 1 In Sales?
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