My favorites have been Foreigner, MercyMe and The Beach Boys.
Most Helpful Girl
Guns N Roses hands down.2
Most Helpful Guy
John mayer was the best live musician I've seen
And thats including, the red hot chili peppers, aerosmith, tom petty, zz top, toby keith, run dmc, imagine dragons, and loads more
John mayer... i felt was the most talented out of allnof them1