What your asking for is something more than a 4 season shelter. In fact, you are asking for an expedition tent robust for the most extreme conditions.

I agree with the above, that Hilleberg is a great place to start (www.hilleberg.com). I have the Akto and it is a great shelter, although you may need something with more snow loading performance (ie. the Soulo). These shelters are not cheap but have been proven in the worst conditions on Earth.

Others would be the Bibler / Black Diamond line (www.bdel.com) and Integral Designs MK line (www.integraldesigns.com). RAB out of the UK also makes excellent expedition tents (from what I have heard).