The list is from therockczar.com... (so I conveniently waive all responsibility for including/excluding certain bands as "Grunge")
Nirvana's 'Nevermind' might already be on its way to Rock Band but what else are we wanting more of?
I'm a fan of polls but not really an expert on grunge, so here's a link to a great thread about the genre:
FlameSama1's Grunge Thread
If you haven't already, please vote for the #1 Overall Band here
#1 Band you would like to see DLC for!