Being a founding engineer doesn't mean as much as you'd think to a non-technical audience, I have zero chance at an O1.
EB-5 requires me to be putting in 1MM$ of my own money. That's significant for me and more importantly not needed for the business.
E2 is the best bet, and I discussed this at length with counsel. The non-dual intent (same as TN) nature of the status though will put me in exactly the same situation in a few years. Expecting me to invest in the country, while not allowing me to put down roots, is ridiculous and not fair to my family.
Also, I do realize that it's technically possible to apply for citizenship while on TN/E2, but that prevents international travel. I need to be in Canada regularly to care for my parents.
edit: modifying original post to weaken "no legal way" to "no acceptable legal way". Anything is possible.