This has nothing to do with rankings, not to mention taste, but it's just best to just go ahead and get this out of the way. Snoop's voice is enhanced by Auto-Tune, which is often mistaken for a vocoder, though he, and the tube in his mouth in the video, are paying homage to Roger and the Talkbox. (Triple Word Score!) In the true spirit of speech recognition, getting it wrong, and signal distortion, there was an animated send-up called "Butternut Reduction."
#50. Snoop Dogg "Sexual Eruption"