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The fan needs to be a little more than half way in the shroud. If it is, that's all you've got.

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Does it heat up in traffic only? If so then it is an air flow problem. Maybe try a "fixed" fan instead of a clutch fan. Does it cool down once moving down the road? If so then your air flow is okay and it is definetly a fan problem. If it stays hot all the time, then look at a lower temp thermostat, a radiator issue, or a lower hose collapsing, or a combination of any of these. (straight water will cool better than an antifreeze/water mix.)