Not everyone's cup of tea, of course, but I've always thought that Steve Knightley's 'I'll Haunt You' is an interesting song. And Seth Lakeman's 'Solomon Brown' about the Pennlee lifeboat disaster is a good one.

And if we're talking about Stan Rogers, his Flowers of Bermuda is such a good song. http://www.youtube.com/watch?v=YVUei-0WYC4