Sorry to go back to old topics but New Richmond and Fergus Falls were extremely violent tornadoes, and were likely the most intense ever documented in each of the respective states they occurred in.
New Richmond almost entirely swept away a large residential area of town (a previous poster already showed pictures of this), carried a safe weighing over 1 ton a full block, and leveled/partially swept away a large multi-story hotel.
Fergus Falls may have been even more violent. It completely debarked trees, swept away a train station, and even ripped railroad tracks from the ground at one location. That is VERY impressive. In addition, large and well-built homes were swept completely away in residential areas of town, with the the ground being pretty much swept clean of debris. Such a clean sweep in such a densely populated area is pretty remarkable. This is visible in the background of the panorama below, though you have to enlarge it to see. It's easy to miss because of the lack of debris, but check out the large the completely wiped clean foundations where large homes once were.
Oh and Flint was pretty monstrous too. Maybe not quite as impressive as the other two mentioned above due to all the photos showing poor foundation construction, but again, very impressive given the population/building density.