Johnhenry'shammer - "getting deeper into folk" (or the study of Anglo-Saxon verbs or horticulture, for that matter) is a process of collecting things, then following them to see where they lead. There's nothing wrong with asking a group of people known to be interested in the same stuff "what about this one" and "how about that one" but you'll get mixed results. Following the clues is the best way to figure out what it all means to you. Up above you reel off a bunch of names, investigation of which could easily occupy you for a year or more. Moreoever, each one of those names will lead to others. Write 'em down. Find the info. Find the music. Report back with your thoughts & reactions, and you'll get TONS of worthwhile feedback on YOUR thoughts & feelings. We can all sit here & say "Yup, for sure you should check all these guys out, and don't forget this one or that one" but it's your journey, and it's WAY more fun following your own uniques sequence of signposts. My journey in folk music started in about 1949 or 1950 when I heard the Weavers "Goodnight Irene" on the radio in our kitchen. I had a lot of catching up to do, and I'm not there yet, but there are so many sidetrips along the way, and no two itineraries are alike.