just adding some names i've not seen mentioned, but should be!
Erol Alkan (esp the bugged out/in mix)
Steve Aoki
Shinichi Osawa (fav artist of 2009 - from Japan)
Autokratz
Boyz Noize
Digitalism (some stuff on the pop side admitadly)
Felix da Housecat
Tiga
Filthy Dukes
**** Buttons
Hot Chip (more their Dj mixes like Buggin In/Out, DJ Kicks, Essential Mixes)
Jesse Rose (i LOVED his 'What Would You Do If You Don't?' album in 2009'
Miss Kitten
Moderat
Modeselektor
MSTRKRFT
Nathan Fake
Rex the Dog
Soulwax (their recent sets have mostly been covers of electro bands)
Vitalic
Labels - Kitsune, Turbo, DFA, PIAS etc....
again - my mixes are all in this range and i spend a lot of time on them so check them out and let me know your thoughts!
DJ PsychoCandy: Complete Mixes