S.O.D. and M.O.D. (Method of Destruction) are almost a novelty act. Outstanding oldschool metal/hardcore/thrash tracks with laughable lyrics. Billy Milano is quite a character. A true New York hard rock icon.

My recommendation is for you to check out Cave In from Boston. A former deathmetal/hardcore band that gets proggier every album. Great lyrics and not much shouting. They do shout, but it's maybe 1 line on an album and it's for effect not as a style. Their Antenna album is their best imo, with Jupiter being close behind. Their oldest album Beyond Hypothermia is pure metal with prog tendencies. Lots of e.p.s and comp appearances. Check out the Bad Brains tribute they appeared on. They did a cover of I love I Jah (reggae song) which is unregognisable exept for the lyrics. It's a 9 minute epic cover of a 3 minute song that disintigrates into white noise greatness at the end. Absolutely masterfull.

http://www.discogs.com/artist/Cave+In