True Thrash (Early Slayer, Early Kreator, Sacrifice, Dark Angel, Forbidden)
Blackened Thrash (Gospel of the horns)
NWOBHM (Motohead, Judas Priest, Venom, Iron Maiden, King Diamond)
True Death (Morbid Angel, Megaslaughter, Maze Of Torment, Obituary, Death)
True power Metal (Dio, Gravedigger, Unrest, Manowar)
And neither should "rap-metal, funk metal, or punk metal" be there as well (unless you're willing to call a band such as Pain Of Salvation "funk metal").
i want my metal with guitar riffs like spawn of possesion and necrophagist that go up and down the neck. solos like jason becker. brutal vehemence style growling, and high pitched arsis screams. throw in some old god forbid harmonies, and you got yourself a good band. oh wait, there is a band like that... conducting from the grave.