The angled, compensated saddle on an acoustic guitar is almost always a compromise - the angle gets things 'close enough' and the compensation gets it a small hair closer but it's not really realistic for it to be dead-on perfect on every string. Not to mention that intonation will change for different gauges, and even on strings of the same gauge that have differences in core and wrap dimensions.
Some builders utilize a much wider saddle to achieve a greater intonation range and carve the compensation much more precisely to give as "perfect" as possible intonation (given a particular set of strings, as noted). Jason Kostal's guitars come to mind: