Ha ha ha!
Sorry to break the news but there's nothing even vaguely psychedelic about jethro tull. As many of us experimenting youth in the 60's knew, ian anderson is a conman who pretended to be a wild, outrageous druggie on stage, with his pathetic and equally straight bandmembers.
Sure, he conned millions of music lovers and made a fortune from his fake act. He's a scumbag.
Don't believe me? Listen to the story from the charlatan himself in the film in my post "Top Ten Progressive Rock (British TV Documentary),Genesis, Pink Floyd, Yes, Jethro Tull etc" by going to 44.56.
Enjoy!



PS. Later in the film, phil collins of genesis says "We just thought fuck it! Let's sell out."
Yeah.

I would say it would have to be people like Hendrix and Cream. Mixing psych and blues.