Bonham heavy as they come! Have always loved Carl Palmer! Can't leave out Keith Moon!
Bonham is much subtler than most people realize. He really gave Zeppelin a soul vibe which enriched their sound beyond the typical hard rock bands. Palmer was great but poor guy had to cope with Keith Emerson's never ending masturbation. Moon had the energy, no doubt about it, he was a bigger part of The Who's sound people gave him credit for. When he passed, every body suddenly realized.