John Lee Hooker is indeed the all-time king of the one-chord boogie.

This guy ~ Seasick Steve ~ seems to be a latter-day disciple of Mr. Hooker. Currently the subject of a lot of critical disagreement on another Mudcat thread.

Not everybody's cup of tea, obviously. Intense backbeat rhythm and raunchy electronic distortion seem to be pretty essential to this particular style; it's as if somehting like that is necessary to take the place of harmonic variations as a way to maintain the listener's interest.