We considered putting the Silent Hill nurses in here but, despite their impressive cleavage..s...es...eses (you try making a plural for that word), they're just too fudged-up to be sexy. And if you do find them attractive, seek help right now.
As for safer, less nightmarish characters, there's the very kinky Anaesthesia from Rumble Roses XX and the 'wearing the outfit because it's their job' girls from the Trauma Center series. Just because they're wearing it for practical reasons doesn't mean they're not ultra cute, OK? And just imagine that zip all the way down the front... A note of warning, however - we'd be careful about suggesting an 'alternative' injection. The police will be on their side.
Above: A nurse outfit from lalalingerie.com and some gaming equivalents. Manga art style FTW