Les Claypool has to be mentioned in this thread. I really enjoy his precision player and rhythmic combinations. Primus is the reason I started to listen to King Crimson. I'm going to be dating myself here, but I'll also give a nod to Jason Newstead formerly of Metallica. I've always digged Jason's demeanor. I'm glad that he's out on his own making the music that he likes now. Fieldy of Korn and Twiggy formerly of Marilyn Manson are also mildly assuming. But not because of any technical merit. ;-)
Les Claypool is really a standout in this category though.
Les Claypool is really a standout in this category though.