with some bands the total is greater than the sum of their parts. i.e some good stuff is coming out of bands where idividual standards of musicianship are not that high e.g. the Clash, Ramones, Beatles, Stones, Kinks, Joy Division/New Order etc.

on the other other hand there are many (in my view) godawful bands comprising top players e.g. most prog rock and metal bands

cant think of many bands where one crap 'musician' is being carried by the rest although I felt that Morrissey was the weak link in the Smiths. come to think of it, singers are often the weakest link in many bands.