He's still my all time favorite. I love comedy and the fact his hits on so many levels makes him #1 for me.
He's got some seriously funny material, so did Seinfeld but...
He's got some serious longevity, so have a few others, but not as consistent
His comedy was good for multiple generations. He's had stand ups before, during, and after my time and all of them make me laugh equally in their own special way. Fucking LOVE Carlin.