I would humbly like to point out that there is nothing odd about using a low pass gate with a complex oscillator. This is literally one of the main building blocks of west coast style synthesis.
-- Zacksname

You're absolutely right with the historical connection. From the point of view of building a monosynth I still think a more 'normal'/east coast filter would be really good. Maybe get both! There's many small cheap LPGs available. My friend recently bought a Takaab 2LPG for just 20 €, it's tiny and sounds great. It has three responses/flavours. I have the Meng Qi DPLPG and it's also good but there's just one flavour. I paid about € 50 for it. Both are passive.