UK, US, and China, I'd say.
US and China - Tied. Or just about. China's nationalism will worsen as their power grows; they also have a glorious history behind them, and combined with attaining modern superpower status, will surely spew such crap as "China was destined to always be great, even if it hiccuped every so often." US is self-explanatory; as the main superpower, we are of course very conceited and in many cases, arrogant.
UK - Very resistant to the EU, though this resistance is cracking over time. OR, that's the image I'd get if I listened to CFC, which has such a large liberal slant I don't consider it credible for such data. I do know the Lib Dems are pro-EU, however, and they're steadily amassing power, so Britain's nationalism is indeed cracking. Even if not nationalist, however, they're still good at "tradition for tradition's sake" - see the fact they keep the Monarchy for no real reason other than that it's a symbol of Britain's endurance as a nation over the centuries.
Russia also has a bit of an issue, but I think it's moreso just the fact they're clinging to old Cold War glories. I do know some Russians believe their nation to be high-tech... they believe we wouldn't be able to defeat Iran in a war because Russia would be selling them "high tech weaponry."
Short of nukes, they don't really have much in the way of "high tech", I'm sure. They do have great firepower, but by no means "high tech."
Eventually, Russia will realise they cannot compare to the USSR and likely never will, and they will re-integrate with the rest of Europe, lest they want to be a Chinese province. At this time, Russian nationalism will dissipate. Russia is similar to Britain in this regard.
