I grow all 3 plus Lemon Zest. My favorite of the 4 is LZ.
I would not give up on LZ just because it gets MBBS... unless you live in Loxahatchee or a similarly ridiculously humid part of south florida (yes some parts are more humid than others), in which case, the mango cultivars you can grow without an extremely dedicated fungal program can probably be counted on one hand.
I have 3 established / mature LZ trees. I do get a couple of fruits per year with MBBS, but the loss is negligible. I frankly lose more fruits to animals and high wind. Moreover, LZ is just one of many cultivars in my orchard that get MBBS.
If you're wanting to only plant trees that never present problem nor require attention, your list is going to be pretty small. And, since you're selecting for "extreme disease resistance" as a genetic trait, you have to budge on some of the other selection criteria (eg, flavor, production, etc).
A perfect mango that's top tier in flavor, MBBS resistant, anthracnose resistant, powdery mildew resistant, that produces prodigious crops and that stays manageable -- is frankly a unicorn mango that only exists in fairy tales. That's probably why commercial growers stick to the more hardy (and flavor deficient) cultivars like Tommy Atkins :-).
PS -- Orange Essence is a completely different flavor class from PPK, OS, LZ.