Hmm, for some 'newer' stuff, try Dave Navarro... not nearly as good as Iron Maiden, Metallica, or Black Sabbath (but then again, what new band can compare to those) and may not be as heavy, but he's not bad.
As for 'old' stuff...recently someone had me listen to Crimson Glory... the song Lost Reflections.
Have you heard it??!! if not, find it and HEAR IT! its amazing!!!!