Smashing Pumpkins are on tour right now, I think, and consist of Corgan and maybe Chamberlin. Iha and D'arcy have left. Dont know if that is Smashing Pumpkins or not. Id say they, along with GnR are a good test case for bands that still have the frontman but are not really the same band. Foo Fighters have had a revolving door at guitar since their inception, but since the first album was Grohl playing all of the instruments anyway, I dont know if the rest of them really count, although Nate Mendel has been there all along and Taylor Hawkins since The Colour and The Shape. REM lost Bill Berry a few years back, but to me they are still REM, even though their music has been pretty stagnant since Up was released. Years ago, the first time Weiland went into the pokie/rehab the rest of STP took on a new lead singer (Dave Couts?) and called themselves Talk Show. They were pretty bad. Pearl Jam has gone through their fair share of drummers before landing a great on in Matt Cameron (soundgarden)