I'd nominate Kings X as another band still putting out stuff that excites my senses, and who are still fantastic live. Admittedly, their last bona-fide new studio album, XV, came out in 2008, but it was easily a match for their old stuff. Hopefully, there'll be something new before too long.
I realised after thinking about this that I hadn't actually looked up any news about them for a while, and was shocked to read that their drummer, Jerry Gaskill, had a massive heart attack in Feb 2012, and was in a coma for a couple of weeks. However, he recovered, and was back on tour with the band in the Summer. He then got married in September, but in November, he and wife Julie, lost their house in New Jersey and virtually everything they owned in Hurricane Sandy. Blimey, what a year for him !!!