I have not been able to get into most Coldplay songs, but Viva la Vida has become one of my favorite songs of all time. Also, I was just using the bands I mentioned as examples. I'm sure I could list a lot more if I thought about it - The Who, Led Zeppelin, Elton John, etc. There are also some British bands that I can think of that tend to keep their accent (or it's more noticible) at least for some songs - The Kinks, some of the punk bands (i.e. The Clash, Sex Pistols). Squeeze did some songs in a British accent (i.e. Cool for Cats, Up the Junction) and others they didn't ( i.e. Tempted, Coffee in Bed), I'm guessing that depends on who was doing the lead vocals.