OK first off best band I've ever seen live is Tool.
Second a band I always hated with a passion until I saw them live and they put on one hell of a show was Linkin Park. I know everyone's going to disagree but they can put on a great live show.
Deftones, Metallica, Rob Zombie, Mudvayne, Old Limp Bizkit (before and right after 3 dollar bill was released), System of a Down, Marilyn Manson, Cold, Korn, Pantera and Godsmack.
That's all I can think of for now.