Boards
Is M.I.A. artist of the decade?
http://www.guardian.co.uk/music/musicblog/2009/dec/16/mia-artist-of-the-decade
She'd be up there for me, for most of the reasons mentioned here. That and the fact she produced 2 blinding records.
The National, DFA1979 and FOTL would pip her, but I agree that she is a good 'figurehead' for the noughties.