The Misfits - Walk Among Us and Earth AD. Jerry Only-led Misfits is ok, but the true Misfits included Glenn Danzig, and his presence makes a sizable difference.
Cannibal Corpse - Just avoid the first 4 albums altogether. Chris Barnes is decent in Six Feet Under, but in CC he's just....meh. Check out any album with George Corpsegrinder as vocalist. He's a much better vocalist all-around, and the albums with him are much more sonically impressive. The two most recent albums, Kill and Evisceration Plague are excellent and I'd definitely recommend them to a new listener.
Rage Against the Machine - Battle of Los Angelas. Amazing album, accessible but at the same time it's the band at the top of their game. Give it a listen and enjoy.