If the Melee Knight gets in close combat sure, but that won't happen. This thing has a decent shot at killing a wraithknight in 1 turn with 1-3 markerlights. All well outside the knights shooting range.
The reason this guy is dumb is that only only 3 things can ever realistically kill it. Str 10 melee, D weapons, Grav weapons. Its is all but immune to conventional weapons. It just perpetuates the whole "spam grav, thunderwolves, and wraithknights or you can't do ****"