This is a bit of a difficult question... But name the group of musicians who you feel have had the best careers in rock in terms of not releasing more than 1 or 2 bad albums, switching styles too often (or not enough) , bowing out gracefully before they get stale, not going through a 'pop' phase... etc Hear are some examples of the top of my head John Lennon - Pretty much NEVER failed ATDI - progressed just enough with each album, became better musicians with each passing album , and split up after releasing one of the best albums of the past 10 years Mew - in my opinion never released a bad album