Social media is full of morons. Best knowledge base is here.
We can't tell you what driver to get, that's a choice you'll have to make. We can help with what brands to stay away from, and keeping you realistic in your goals.
Wanting a huge mega power beast knocking the block down with only 2 cubes doesn't add up. But, using a good quality driver that is optimized for that amount of space can give great results.
There are many 12 inch drivers on the market that would work quite well with 2 cubes, but that's net after displacements, not gross. You may need to go taller on the enclosure, as well why I asked about the external aero port idea.
The DC audio lvl 5 12 for example, available through the SSA store is rated for 3000 watts and suggests a minimum 1.5 cubic feet enclosure for example.
https://store.soundsolutionsaudio.com/dc-audio-level-5-12-3-5-m5-3000w-subwoofer/
I have no experience with this specific driver though, so can't comment on it specifically, but 90% is install, so enclosure design is going to be a huge factor.