Check out this band... they're called riot in the valley from canadahttps://www.youtube.com/watch?v=K2HprltzspU
heres a good list>>> https://www.youtube.com/playlist?list=PL7C924A91D47257E1 https://www.youtube.com/watch?v=xRsjszrf8xA&list=PL7C924A91D47257E1"]Andy Griffith - Doug's Tune - YouTube
John Sebastian https://www.youtube.com/watch?v=BU8COHUrGi0 There`s also always Chad and Jeremy, Crosby Stills & Nash, Joan Baez, Arlo Guthrie, etc...Ravi Shankar is amazing if you like Indian music. I`d say to look through the band lists for Woodstock and the Monterey Pop Festival.
Canned Heat *** Creedence Clearwater Revival **** Grateful Dead ***** (Pretty sure somebody already mentioned them but still) Country Joe and the Fish *** Moody Blues *** Pink Floyd ***** As for a newer band, I'd actually bet you've heard them before but Black Keys ****
Stoll Vaughan fits the bill of what you are looking for. Check him out! https://www.youtube.com/watch?v=WN45p9AA1p0
These are slightly different artists but they all take influence from the people you have mentioned Iron & Wine John Smith Samh Allysen Callery
Ray La Montagne Gossip In The Grain http://www.ihopeyourearsbleed.com/wp-content/uploads/2008/10/gossip-in-the-grain.jpg
http://youtu.be/CeDlYhKu-6U this is just a different song to make you smile....Woody Guthrie- Little Sacka Sugar