What are some good sedans that have power and not expensive that I should considering buying instead of a sport coupe?

Hyundai Accent is Supreme 

Since you have failed to define what "not expensive" means, we have to go out on a limb.

The best bang for the buck is going to be a Q50 3.0 luxe.  If you want new, it's less expensive than others in it's class and the same if you go pre-owned but relatively new.  The model has not changed much since at least 2016 (maybe as long ago as 2014 or 2015).

If you aren't looking at a luxury model and want something a pseudo luxury, then a Acura ILX or Audi A4 could be decent options.

If you go outside of luxury then you are going to lose some of the power.