Number 5 and 12 are totally subjective, Number 2 is false (REM has at least three number one single: "Orange Crush", "Stand" and "Losing My Religion" and Depeche Mode has had like 17 according to wikipedia) but otherwise pretty amazing list.
Also you have to take into account that Elvis has had 92 gold certified ALBUMS, 55 platinum certifications and 25 multiplatinum certified albums, which totals to 112 + add the albums that have sold less. And that's only the RIAA statistics. Add all the other countries on top of that. And when it comes to singles, he has 55 gold singles, 28 platinum singles and 8 multi-platinum singles = total of 91. Black Eyed Peas has 9 gold, 4 platinum and 4 multi-platinum, total of 17.