Definitely the Mermen, as John B mentioned, and also The Shi-Tones (which is also The Mermen, actually)
There's also The Mekons (and also Jon Langford), Melvin Sparks Band, Michael Franti & Spearhead, Cracker, Cowboy Junkies, Mogwai, Little Feat.......and a bunch of Grateful Dead and associated groups. (that's what I could see from a quick scan)