There can't be an ideal bike for every person or situation. Everybody has different body proportions, different flexibiltiy, different strengths and weaknesses. Also a bike built to glide over chipseal and gravel probably will be different than a bike to race an 8 corner crit course. The bicycle is just one part of the equation, the other part being the rider.

And the funny thing is that you may not be paying a high premium for a custom frame. Many production frames are now as expensive or even more expensive than a custom frame.