Although Ian Paice's technical presicion can make you sit up and take notice, Bonham's sheer ferocity, and the complexity of his beats make him the undisputed king. Listen to the bizzarre beat scheme on Fool in the Rain, the crushing inevitability of When the Levee breaks, the virtuosity of Godd Times Bad Times, and of course Moby Dick, preferably the BBC version as the later versions are somewhat less spectacular (or maybe I just got over drum solos [heaven forbid]).