My favourite Wilco song is off their sixth studio album, Sky Blue Sky. The 2007 release was the first to feature the string work of Nels Cline, one of the best guitarists in modern rock music. The second half of "Impossible Germany" is a showcase for his guitar work, starting at 2:45. Just listen to the things he's doing, at times understated, at times most definitely in plain view, but at all times tasteful, melodic and inspired. It's just amazing!
Watch and listen