You can choose multiple bands here.
Led Zeppelin, Pink Floyd and the Beatles.
It will always be The Beatles for me.
The Rolling Stones, Led Zeppelin, Pink Floyd, Aerosmith and the Police
If I could only pick one....abba
One not mentioned, would also be Chicago.
I like them all, The Beatles the most, but...
Abba's just okay, sometimes, a few of their songs, but the Backstreet Boys, no. As for the Beach Boys, even though I can appreciate their talent, I really can't stand 'the California sound'.