I run an 09 pantera classic, something is way off in your numbers. That boat should run 70 gps without much issue. Most people run a 3 blade fury prop in 25 or 26 pitch, but there are plenty who run a 4 blade as well. What is your carrying load? Jackplate height? Water pressure at WOT? Have a hotfoot?
Your boat should hit 70 pretty easily if you are solo. Typically a 3 blade is faster if you are not loaded too heavily. If you have 3 guys in the boat and livewells full and gas tank full a 4 blade will be slightly faster. I would expect your rig to run 62 loaded heavy like that but as some of the guys have said a 26 is probably too much pitch for a 200 on that hull.
Here is the deal. In cold weather and cool water, you might be okay with the 26 if you are loaded light & running solo. I doubt you will be able to turn a 26 loaded down in the hotter months. Heat & humidity are horsepower robbers. It is not uncommon for any boat to lose 4-5 mph in the summer heat.
If you have a dealer or prop shop that will work with you and let you try some props, I would start with a 25 Fury for cool weather, light load. Then fill your livewells and gas tank and try the same prop. It will feel more sluggish getting out of the hole. That's normal but see how the 25 runs on top end loaded down.