My answer would be "no".

Step one will be to somehow influence (improve) the city's taste in music as a whole. Does that start with new independent radio stations? Can that be profitable?

There won't be any independent radio stations in the near future. Most are mortgaged to their eyeballs (and this credit crunch isn't helping), therefore cost cutting and maximizing profit is critical. All major stations in OKC are basically owned by 3 corporations. Citadel, Clear Channel & Renda Broadcasting.