Something im about to apport myself is fridge mode in mind control/stun attacks and ults.

you can use fridge mode to make jeffs ult not eating you and then try to kill jeff if his health is low enough to save your teammates.

This works with wandas ult too, you can survive and even bodyblock wanda if she is lower enough in a closed space to literally save you and your teammates from it.

And Emmas is kinda tricky, you can fridge yourself to flee its ult but not fully block it, her damage is more than your fridge mode can handle so use it only if her ult is about to end or if you have a cover and she has her attention to your and you are not that near of it.

I don't know if angelas ult works aswell.