U2

U2 are the greatest artists of all time for a simple reason: they have always been able to renew themselves and try different paths, they have never sunk into the same genre of songs, with each album it feels like you're listening to a different band! In this way, they haven’t become a “relic” band like the Rolling Stones, ACDC, etc., who, once they found the right formula, stopped there offering the same songs over and over again!