He was more of a junkie.. And he died at 29, so I'm sure there are tons who've smoked more than he. Even though, he was god.
Louis Armstrong... the OG of smoking grass and jamming it out hard all night; smoked every single day and was the greatest living Jazz trumpeter for more than 40 years. He even topped the Beatles for the No. 1 spot on the Billboard charts in 1964 during the height of Beatlemania (he first became famous in 1920). Duke Ellington was also quite an enthusiast, and was the most prolific Jazz composer of all time.
I can't believe nobody's mentioned Jimi yet. Alright, so he may not have smoked as much as Bob Marley but still, the guy wrote Purple Haze. That, and if you listen to most of his live shit he's laughing and guffawing like a maniac.
You are a badass for mentioning the guitar god. I also second dimebag, can't believe noone has mentioned Dave Matthews, and Willie Nelson.
I have to support Bob Marley, according to a biography I read about him he smoked several pounds a week, that is alot of ganja!