Here is a list of the abilities I've tested for the Unholy Trinity:
ST, KM, Void.
With KM, Sabretooth can bypass these. Again, I'm pretty sure this isn't complete; this is only what I've tested.
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Masochism
Astral Evade
Ice armor from reforming
Cable's degen on bleed
Reflect stun
Auto block+
Invincible+
Unstoppable+
Crossbones' fury conversion
King Groot's shrug off
Groot's shrug off
Hood's invisibility+
Glancing*
Any buff on hit (fury, armor up, regen, etc.)*
Doctor Strange's buffs+
+ = for the .07 seconds, does not remove buff
* = debuff has to cause buff; buff can reform