From their 1993 debut through their conceptual albums in the 2010s, one of the most prolific rap groups was also one of the most progressive bands in modern music: the Roots. Even though they were a rap group with many instrumentalists (they included a sousaphonist in their roster starting in 2007), which may seem like a dated approach, they never stopped being inventive, either with their own songs or with the wide range of collaborations they engaged in. With their subsequent studio albums, they achieved platinum and gold status and took home several Grammy Awards.