a buddy forwarded me a link recently announcing "Black Sabbath's final concert". to my mind the real Sabbath has been dead a long time, but you know how these things go. (worth a google, some good footage) i can't say i blame the old guys for wanting to get together and play that incredible music again and make some bucks doing it. the older they get the more they themselves must be amazed at what they achieved. personally, i think that few people truly understand the scale of the contribution of this mostly obscure band had on rock that came after. to the uninitiated, the name and imagery are too much to look past and that's where it ends. to the curious and patient, they are an eccentric art rock band of immense and utterly unique creativity. but i digress……
there are so so many, and there is no definitive answer (but i bet someone could program an algorithm to measure 'fatness')
my vote is Sweet Leaf. the original and ultimate shoe gazing masterpiece. a riff so fat, greasy and dirty your wife won't want it in the house.
