It definitely appears to be the LH fuel pressure regulator/high pressure fuel pump. I replaced the fuse again, unplugged the RH fuel pressure regulator and reset the codes before starting the engine. Only 2 codes came back:

004764 - Fuel Pressure Regulator Valve; Bank 2 (N276) - Open circuit
000135 - Fuel Rail/System Pressure - Too Low

EPC stayed on, but the fuse didn't blow and the engine ran smoothly. The car was drivable up to 3000 rpm (where the engine cut out due to not enough fuel pressure). After driving, no further codes popped up.

Interestingly, I found a YouTube video showing my issues almost exactly: https://www.youtube.com/watch?v=WX8q4t_WAoE

My car had also fried its ECU about 6 months prior, but was running fine up to this latest episode. This was probably the root cause. Prior to its replacement, there was NO communication to it and no start, so no codes.

I'll let you know the results following replacement, but expect this to be it.