I don't see how winning a Nobel prize makes someone less ideological, especially if they're already widely known as particularly ideological.
For example, Soviet economist Kantorovich won the same prize the year following Hayek for work related to central planning, and I'd consider him a lot less ideological, not because of winning the prize, but because of his overall approach to issues: http://www.nobelprize.org/nobel_prizes/economic-sciences/lau...
My point was that if you want a non ideological economist you're going to have a hard time finding one and that Hayek is as much an economist and no more 'ideological' than any other influential economist: from Hayek's contemporary Keynes through Samuelson, Friedman to Krugman they're all indisputably significant figures in economics and Hayek is no more ideological than the others. If you're going to dismiss Hayek as ideological you have to pretty much dismiss economics as a discipline entirely.
For example, Soviet economist Kantorovich won the same prize the year following Hayek for work related to central planning, and I'd consider him a lot less ideological, not because of winning the prize, but because of his overall approach to issues: http://www.nobelprize.org/nobel_prizes/economic-sciences/lau...