For originality, you've gotta love the Itasca Wampus Cats, Hutto Hippos, Progreso Red Ants, Cuero Gobblers, and I'm surprised no one mentioned the Grandview Zebras or the Knippa Rockcrushers. The Hamlin Pied Pipers and Winters Blizzards probably deserve something too, but as long-time nemesises of the Stamford Bulldogs, they get no credit whatsoever.
I, however, for my favorites, vote for the Lewisville Fightin' Farmers and Flower Mound Marcus Marauders (my dad taught at both back in Old Army days), Munday Moguls (family hometown and my original residence), Sundown Roughnecks, and the Boys Ranch Roughriders.
"Remember son, when you represent Texas, always go first class."
--Texas, by James A. Michener