Here are a few more modern ones.
The Fantom Wildcat, the Fantom Crosswinds, the Hoover Windtunnel 2 with the troublesome "rotating" filter, the Hoover Savvy with the double brushrolls, the Eureka Bravo, the Dirt Devil Upright with the "C" bag, the Bissell Powerforces with the hopelessly clogging filters, the Eureka Airspeed One with the flat foam filter? Not all of these machines are necessarily "bad" but their reputations have come into question many times on this site.