I've always had a weak spot for those '70s 'harmony bands', like S&C, CSNY, America, and the early Doobie Brothers.
S&C might have been the most intriguing of them, even though they get excessively mellow at time. That greatest hits of theirs has a lot of great stuff, along with a couple of bland moments.
I've also been digging on the Doobie Brothers' "The Captain and Me" lately.
70's folksy harmony.
Down with that.