Well, couple of hardcore rockers that still bring it today.
I picked Paul Stanley (by a long shot) but I have to say his voice has really declined in recent years. Have you seen recent Kiss footage? It's a shame really, the man had serious pipes.
Yeah, from around the mid 2000s his voice has been declining noticeably. He's had vocal surgery in recent times, so he's definitely had ongoing vocal issues, but even with KISS now tuning down a whole step since the Monster tour, it hasn't helped much. You can hear a crunchiness to his voice now that he never had before.
But even up until Kiss Alive 4 and the following tour or so, his voice was sounding really strong, good range and tone. The combo of vocal issues plus constant touring every year has taken its toll.