Do you have a last.fm profile?
If not... what specific subgenres of electronic are you looking for, and what are some bands you enjoy from all of those genres. Just so I have something to start with
As a starting point:
Electronic:
Breakbeat: Bassnectar - Underground Communication
Drum&Bass: Black Sun Empire - Driving Insane
Pendulum - Hold Your Color (Not strictly D&B but still good)
Dubstep: Kraddy - Truth Has No Path
Psytrance: Sphongle - Are You Shpongled?
IDM: Venetian Snares - Rossz Csillag Allat Született
Ambient: The Orb - Adventures Beyond The Ultraworld
Electro: Amorphous Androgynous - The Isness
Electrofolk: Electric President
Rock:
You really need to get more specific here... decades, subgenres, etc.
Alternative isn't really a genre... I'll deal with that in rock.
Cold War Kids, The Vines, Sam Roberts?
Indie:
Bryan Scary and the Shredding Tears - Flight of the Knife
Andrew Bird - Noble Beast
The Hold Steady - Stay Positive
Radical Face - Ghost
Howlin Rain
Hip Hop:
Black Star
Black Violin
Classified - any
Deltron 3030
DJ Shadow - Endtroducing...
Hilltop Hoods - The Hard Road (Get The Hard Road Restrung if you want it with orchestral music)
Madlib