I'll second Erin Kennedy. So many of the sims do clean up nicely with a little effort, but I have a sneaking suspicion Erin is already cleaned up, y'know?
I also like Juan Darer, but I'll add another: Bobby Sargeant of Twinbrook. I know he's supposed to be attractive, but his cheekbones look like they're going to consume the rest of his face.
Also, I just ran across a cop during a burglary who you'll love: Dee Tex, also of Twinbrook. This isn't the first time I've run across her, so I know she's a recurring character if you can find her. She reminds me of a spider monkey, or a tree frog.
Oh, another thought: the Twinbrook maid Anne T. Septik. Not sure if she cleans up or not, but worth looking into.