The Twa Sisters/Wind & Rain/Barkshire Tragedy family.

There's also "the Black-Haired Lass", in which the suitor is killed by the girl's brothers but comes back as a ghost to tell her about her family's treachery. The recording I have is Bob & Evelyne Beers.

"Boglin's Smuggling Men" is an Illinois variant on a UK song in which a woman lures a young man into the woods, where he is robbed and killed. I've got it on an Allen Street String Band tape that I believe is no longer available, but I'm sure it's on other recordings, too.

"Pretty Polly". "Jesse James" (all of them), among lots of other outlaw ballads. "Captain Kidd".

New "trad-esque" songs could include Gillian Welch's "Caleb Meyer" and "One Morning", and there are lots of country songs that extend the genre into modern times.