I think Dylan said he got into Odetta before he got into Woody.
The Shakespeare analogy is valid, even if I think Shakespeare is greater. Both did revolutionary things with the language, both were popular entertainers, both copied or borrowed from everyone and everywhere, yet sound unique, both are eminently quotable. Much of Shakespeare isn't relevant anymore, as well, to use your train logic. Plenty of differences too, but that you'll find with any comparison.