IMHO, any band succesful enough to make more people interested in a genre I like is a good band, because then the copycats start fishing up all sorts of music out of the genre that I might never otherwise hear. This all goes into my head to send me looking for good songs, or to enrich my listening and playing. I don't bother to rank them-- I just assimilate what's good and keep on the lookout for whatever is good enough to keep in my head or on the shelf. There are a lotta songs I would never have looked at, that are very dear to me now and have gotten out into my listeners' hearts, that would not be there if I hadn't heard someone play the Clancy's stuff. It only takes on memorable line or one stirring phrase of melody to change the whole world. I don't care who it comes from as much as that I stay open to receive it.