Stacking two 1-pole (6 dB/oct) high-pass filters is definitely an option, but it doesn’t behave exactly like a single 12 dB/oct design. The slope doubles, but the overall response (phase and the cutoff alignment) will be slightly different.

The SVF can do a true 12 dB/oct response that's mathematically “neutral”.

If you need more control over the resonance, a Sallen–Key filter is another solid choice for a 2-pole high-pass filter.

@coupe70 ah yes, iPlug has a notoriously small binary size and a very basic feature set if you compile a minimal example. Any JUCE made plugin has at least ~12MB of size because there are more things included (graphics frameworks, plugin wrappers, other stuff). HISE adds some things onto that - even if you just compile a effect plugin with a simple filter, the binary will include the code for the streaming sampler module, the scripting engine and all the rest.