If I totally overlook what bands you have mentioned (heh) and only focus on good thrash I would recommend
Forbidden, (the albums Forbidden Evil and Twisted into form)
Heathen (as mentioned before)
Overkill (also been mentioned but not to be missed)
Enforcer
http://www.myspace.com/enforcerswe
...
Whiplash
Exodus
and bla bla more bands but now I have to do the dishes