Tough decision but I have to go with
Pink Floyd
Tool
Soundgarden
Pearl Jam
Rage Against the Machine
Follow
@nova - I can find 2 I'd like to eliminate all-together (Kiss, Megadeath)
But only 5 to keep?
Rush (lyrics)
Nightwish (there's not enough female representation)
Stones (raw rock)
Killers (pop)
Then a toss up between Linkin Park (for the rap aspect) and Tool (for the artistic aspect) - I can't saw which way I'd lean any particular day.