Hi, Mr. Hammer - I'd agree with open mike that you might like John McCutcheon. Bill Staines is another one. In another thread, somebody posted a link to a page titled The 111 Greatest (Anglo-American) Folk Music Artists - there are some great suggestions on that list (although many of my favorites are on the "also considered but not included" list at the bottom of the page.
Bok-Muir-Trickett might really interest you, as well as the Golden Ring recordings - both are from Folk Legacy Music, my favorite record company.
Hope that helps.
-Joe Offer-