John Blakemore's mastery of the Zone system and his printing shows Ansel Adams was a mere beginner in comparison.
I did a Blakemore workshop in the late 80's but found I was already using the same techniques, (not a complaint - it reinforced the way I work) much came from Minor White and Peter Goldfield - a UK photographer, pharmacist and specialist photo dealer )alongside his chemists shop, he'd been an assistant to Minor White. Peter owned Goldfinger and after it closed Martin Reed continued as Silverprint. I was already inspired by Johns work and also Paul Hill.
A Blakemore workshop is probably about the best you could go on, go for it.
Ian