Peter, Bunny, and Bob. My favorite anyway. Peter Tosh being the best musician of the three. Other groups are far more talented musically.
Floyd or Zeppelin probably get my real vote, hard to choose between the two. Others deserve it, but they were more individuals than groups (example: Hendrix). Probably have to give the nod to Floyd. We will never again see a record released that, 20 years after it's release, is still in the top ten (?) on the billboard charts.
The Beatles are definitely not it, they are equivalent to Britney Spears in my book. Very overrated, all they really had going for them was a great marketing strategy. Their music is just above par.
Les Claypool will go down as one of the great musicians as well, in time. Within 10 years I see him and his countless projects drawing a following close to that of the Grateful Dead.