The stock pickup in a Jaguar H bass is a superlative passive MM design, especially after you ditch the "guitar" controls, pots and tone cap and rewire it using a '62 P-bass schematic and component values. Now, when I want minimal noise and even more flexibility, I have rewired one of my projects with an EMG MMCSX for great tone, quiet operation, and versatility.
My only other experience with EMG HZ pickups was my 5-string party bass that I got over a decade ago. The HZ's were stock pickups. To me they sounded muddy so within a year I had upgraded that bass to full EMG actives, including an EXB in the circuit, for better tone, more versatility, clarity, and lowest noise possible.