Filter? Well, if you're in a situation where the build's only got room for one, this is probably the one you're looking for: https://www.modulargrid.net/e/tiptop-audio-forbidden-planet .
It's a clone of the Steiner-Parker Synthacon's multimode filter. And take it from someone who had a Synthacon for a number of years: if you can only have ONE VCF in your system, this is one to have. Bass ranges pound via the LP input, and the bandpass and HP inputs are capable of yowling leads that will cut through most anything. And it's cheap, too...$120. Fits right in that 8 hp hole.