We used to have Stan Hugill at our club in Aberystwyth in the sixties. The world expert on shanties- what he didn't know about them wasn't worth knowing - a lovely guy and a great character - but what a dreadful voice! If one of the nineteenth century shantymen had a voice like his, he'd have had to walk the plank tarred and feathered.
Your mileage may vary, of course
Cheers
Ray