If you're looking for an American band, you can do no wrong in pulling up Grand Funk Railroad. Mark Farner was the lead singer, songwriter and guitarist of the band, and he's still out there, writing new music and touring with his new group, Mark Farner's American Band. He has a new live DVD, Live From Chile, With Love.
To order a copy of the DVD (and it'll be signed by Mark!) and for more information, check out Mark's website.