You're never far off when mentioning Wilco, Bragg, and Son Volt in the same breath,
@Jojo. Wilco and Son Volt were both born of the same band, Uncle Tupelo. Bragg is not a Drive By Truckers alum, but he did record an album with Wilco. The other (primary) lead of Drive By Truckers is Patterson Hood. All good ones, in my opinion.
My favorite among the lot is Wilco. I first heard them when my friend brought home the AM album. "Box full of Letters" really grabbed me the first time I heard it. Straight up rock song (something of which I may never tire) with great lyrics.
Their next album, Being There, was a long time coming, but it was worth the wait. Jeff Tweedy really started coming into his own artistically on that album. If memory serves, the next album was Yankee Hotel Foxtrot, which I think won them a Grammy and was really good, but I don't think it was their best; Sky Blue Sky gets that honor to my ear, as it showcases not only Tweedy's amazing songwriting, but also some of the most incredible musical interplay to which I've ever exposed my ears. Every member of the current lineup is as good as anyone else out there at what they do. I think Nels Cline (lead guitar) and Glenn Kotche (drums) may be among the very best alive at what they do. For a ridiculous guitar solo, check this out:
Loved Son Volt, too. Jay Farrar is a great talent, too, but different from Tweedy. The Trace album came out just before Wilco's AM, and it may still be my favorite album to listen to while driving at night. I am still fascinated with this song; the guitar sounds and moaning vocals create a "feeling." Don't know how else to describe it.
While these are some of my favorite examples, I am a lover of all styles and origins of music. There's even hip hop out there I really enjoy (you have to look for most of that, but it's there). At the end of the day, though, I'm a rocker at heart.