She's r&b, funny they all started around the same time but only one is still here, lol.
History remember greats at their peak not year by year, Beyoncé is now so you're trying to nit pick why she's not a great. It's funny though that sales by year is your whole argument. Outside of thriller mike got outsold by another artist each year he dropped an album
1979 (off the wall) Billy Joel was the highest seller
1987 (bad) Bon Jovi highest seller
1991 (dangerous) Mariah Carey was the highest seller
1995 (history) Hootie and the blowfish was the highest seller
2001 (invincible) Linkin Park was the highest seller
Do you look at each year and say man mike ain't the king cause before and after thriller he got outsold by artist that came and went? Look at you're example with Mariah and Beyoncé, Mariah also outsold dangerous, so using your own talking points you're also putting Michael down.