Would also buy Omnibi of any & all titles mentioned here, i.e. WWBN, Frankenstein, Ghost Rider, etc.  Big fan of '70s horror comics in general, no matter who the publisher was.

Re: the size of the Omnibi being off-putting if it's an oversized one (i.e. Man Thing, John Byrne FF, etc.), I see the concern about this.  However, I would still prefer to have the material in one large volume (if possible) than several smaller ones.