For me, it doesn't get better than Zappa's Rat Tomago. It doesn't have the emotion that most people cite, nor the backstory of Watermelon, but it is a guaranteed 2pts on my license. For bonus points, I got to the boot of Berlin in 78 from where Rat Tomago was taken, as the solo from The Torture Never Stops.
A decade ago a kid covered Rat Tomago live with Dweezil. I was at that show in Woodstock, NY. It renewed my hope in youth and humanity.