I'm sorry, by half the other Nighthaunts, do you mean Hexwraiths and Spirit Hosts? Because apart from heroes, they're the only 2 units that have the Frightful touch rule. I don't see achieving this kind of list with Hexwraiths or Spirit Hosts, much less on a single hero, so I don't see how they're replaceable in that manner. Also can you tell me which Nighthaunt units have a lesser reliance on the buffs? Because the more Elite stuff that you could try to compare are probably the Bladegheist Revenants, and they're 2/3+/3+/-1/1, which isn't that much better, even considering their special abilities. and then they cost a lot more for a max of 20 models.
I'd say this can be achievable with Chainrasp Hordes, but then again you're losing the -1 rend, which is a lot.
Not this effectively, no. Atleast not IMO.