BBB Swell Site
Back in 1994 animation historian Jerry Beck compiled a list of the 50 greatest animated cartoons of all-time as voted by folks in the animation industry. Here's a site that purports to have links to most of them. Though there have been other lists, this one is impressive.
Showing up at number twelve, one of my personal favorites, The Rabbit of Seville. Since it's link wasn't working I offer it here. [Towards the middle, the video and audio get a bit out of synch but IMHO it's still worth a watch.]