thin white duke
Hopkirk
or go as one of the police guys (in black) who knock the workers (in white) about if they get out of line
or
Try this number
Nothing more white than this dude.
thanks guys, some good ideas here.
Some others, I had:
Phone book
Polar Bear
Some friends of mine came to a party as Blofeld (her) and white cat (him) which I thought was cool.
(although technically Blofeld wears an awesome grey trousersuit to work)