Queen
Queen is hard to listen to these days. Aside from their fantastic "Bohemian Rhapsondy," the rest of their catalog is messy and avant-garde to the point of annoyance. Though Freddie Mercury truly did have some pipes, he overdid it with Queen.
Kendrick Lamar
Kendrick Lamar is who people say they like when they want to sound way cooler than you. His lyrics aren't actually that deep, and his voice is mediocre. His musicality is amateur at best, and if you're looking for a rap GOAT, you should be looking elsewhere.