High-performance brake pads can help, but if you currently have to stand on your pedal to stop the car, your problem goes beyond pads.
I have non-power discs with factory style pads on my Mach 1 and stopping the car hard requires little effort. Even my old '69 Cougar with non-power drums all around was easy to stop.
You might wan't to check your brake system; master cylinder, distribution block, proportioning valve. And, are you certain the calipers are working perfectly?
I rebuilt my front and rear brakes and had to stand on the pedal just to get the car to slow down from 15 mph. I used SSBC's slotted rotors up front and a stock drum setup on the rear. The front pads were a set of semi-metallic that came with the rotors. I adjusted the rear and re-bled the entire system and had no change.
I decided to put a set of EBC Yellow pads on the front, and the first time out, no changes other than the pads, I could lock up the front tires with about 1/2 the pressure I was previously using to try to stop the car.
I am not sure how they will affect the rotor wear, but mine is not a DD and they are not the original rotors so that is not a worry for me. They do make a little dust, but it just rinses off my clear coated rims. The most important part, I have complete confidence in how my car stops now.
Edit: Why I chose the EBC Yellow Stuff
it may be more than the Op is looking for, but for me, when it's not sitting in a parking lot at a show, I do a little "spirited" driving. Drag racing only requires that you be able to slow down/stop at the end of the strip. I am looking forward to doing a little parking lot Autocross events, so performance braking with the factory setup was much desired.
EBC Yellowstuff Fastest Street, Race & Drift Racing Brake Pads
High friction formula improves brake effect 30%.
Fastest brake pads for Street, Drift & Race
Zero brake fade makes this material perfect for fastest driving
Capable of repeated heavy brake use without brake “Fall-Off”
Very minimal disc/rotor damage characteristics
Suitable for shorter track events and race use
Medium hardness material feels good at pedal
If all you need is stopping power, this is the material choice
ECE R 90 type approved for most cars
Features red “brake in’ surface coating for instant safe braking after install
EBC Yellowstuff 1793 compound is a true winner all round, it has high friction from cold, not requiring warm up for street use yet when loaded up and really hot the brakes just get better. Even up to truck weights these pads grip and do not heat fade.