It´s a nice list! I´m ok with it. They gave at least one to Miguel, Usher and Frank. Which is good, all of them, but not too many to anybody
The big ones: Album of the Year and Record of the Year: nice choices

Grammys are respectable in their own way. It´s the best awards we have. But of course not being a big winner doen´t mean you are a worse artist then people who have many.
With that said, the BIG grammy winners in history are not the likes of Beyonce (just an example). Those type of artists have won many but always in the same categories, in a specific genre. Never the big and main ones. Adele, Whitney Houston and Celine Dion (just to give 3 examples) are bigger grammy winners than Beyonce despite having less in number. Why? Cos they fucking slayed everybody winning the big ones in their respective years: Album of the Year and Record of the Year

And about Rihanna... are you kidding me? That girl has zero grammys. Only grammys that also go to the singer are Album and Record and then the vocal categories. Rihanna is not a songwriter (well she is a little bit in the way Beyonce is, you know what I mean) so the few grammys she has for her own songs are probably not hers (don´t know if she´s ever won for best vocals, I doubt it) and the rest are all collabos. Dead at Rihanna fans trying to make it seem like the grammy for best video is anything too important, when it´s not even going to be for her :)