Ignore all collisions within specific actor

My newly created character feeling pain, he is colliding with itself:

84423-screenshotbrokencharacter.png

Just jokin’…
The question is How to disable every collision within actor components?
One moment: I can’t use channels, because there is can be tons of characters, there is will be not enough channels.
This is really easy one, but I can’t find solution anywhere…

That’s really… I don’t know what to do, there is no actual solution for this at least in blueprints.
Is there any C++ solution?
I’ve tried to see “Ignore collision” in UE4 sources for Physics Constraint, but it had only flags for constraint.
I have found AddIgnoredComponent in PrimitiveComponent, what actually C++, but this is not a problem.