Oh...we must have a jazz snob visiting the board today ;)
Peart is easily the greatest “rock” drummer ever to play the drums. Period.
Greatest drummer ever? No. That belongs to Buddy Rich.
Greatest drummer today? No. There are entirely too many players blowing up in front of our eyes every day on YouTube and Dennis Chambers is still alive and well...imo he is probably the best we have behind the kit..but that is just my opinion.
But when it comes to Peart? He is the most influential drummer to ever live.