Best Body guards vs. Horrors?

[PsiSoldier]

I'm curious if anyone has any thoughts on what the best units are to guard commanders against Horrors and Doom Horrors.

I'm currently trying out Iron Dragons as body guards in a game where Astral Corruption was cast and my commander WILL be attacked by a Doom Horror. In the past I have used Abominations in another game but some of the Doom horrors have pretty high MR so they may not work too well all the time since their Gaze is negated by MR.

Some of the Doom Horrors also use Ranged so if you have melee body guards that just stay by the commander they might not help out too much in that case.

So I'm curious if anyone has any units that they like to use that work pretty well against Doom Horrors or maybe even against regular horrors in general.