Dre is certainly at the top of the mountain. There might be a few folks up there with him, but you don’t get better, that’s for sure.
Snoop did have a good voice for rap. Honestly, I have limited exposure nowadays, but anytime I hear a more modern rapper, Kanye, dude with the tats on his face, I’m like, “wtf, these guys sound corny as a muv” compared to that late 90’s crew.
Since it just popped in my head and likely never will again, honorable mention to method man and redmans album from back in the day, and busts rhymes has the voice too.