Sion

because you're into the heavier stuff, you'll want to avoid pretty much all Beatles stuff, as they did almost nothing close to heavy...save perhaps for Helter Sketler from the White Album.

as for Led Zeppelin, while they are not in the same league of heaviness as a band like Slayer or Pantera, et al., they were one of the progenitors of heavy rock and have a few songs that might interest you, most notably Achilles' Last Stand (from Presence) and Wearing and Tearing (from Coda). I'd strongly suggest checking out at least those two.

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He's the best, of course, of all the worst.
Some wrong been done, he done it first. -fz

I jus' want ta thank you...falettinme...be mice elf...agin...