Fiat 500. Both premiums.
Mitsu Galant VR4
I can probably list a number... but I'll just paraphrase and say, look into tuning some of the off beat standard models. Or some of the standard models that are popular... but they're overlooked largely due to the lack of ability to "visually customize them".
That said, tuning in conjunction with the current seasonal events will gain quick notoriety? As I stated in the fiat 500 thread, I was able to get 2nd with the 500, but I suspect with proper tuning, it would be a giant killer. Either of the premium ones.
Now that I've wholly contradicted myself and essentially told you how to run your business, I'll be quiet. Haha...
I'd be happy to help with some reviewing though. Just pm me a tune when it needs reviewing for faster response.