Back to Jackson, today some celeb on the podium said that Jackson was the greatest entertainer of all time.
His claim to that honor is have the highest selling single album, "Thriller" which was released when he was in his early twenties.
However, he did not sell as many records as either Elvis or the Beatles, who had shorter recording careers. None of them would qualify as the greatest entertainer though.
Bing Crosby was the most popular "pop" singer of all time. He had more #1 hits than any other singer. But, he also did radio, TV, and movies. At one point, more than 50% of the music on the radio was Bing. And he sold over 1 billion movie tickets, probably the largest box office draw there ever was. To say MJ eclipsed Bing Crosby as an entertainer is laughable.