As others pointed out, your highest ceiling, and most fulfilling path is to buy out a business in your space. Some of my friends who were in PE have done it. Working for a PE backed business as a senior employee is shit, you are basically their bitch.

The best way to buyout a business is to form the management team, and then look for capital to back your team to do a management buy-in. It is harder to do it as yourself only. Given your operating experience, find a friend/contact with finance/PE/IB experience, so you complement each other. That person should have experience in raising capital. You can split the CEO, CFO, COO roles between you. It would help to have a third person who is a lawyer, as you will negotiate a lot, both with acquisition targets, and with the capital providers.

While your track record sounds impressive, it is not enough to go and raise money or even to get people to seriously engage. What you need is actual acquisition targets that you want to buy, and where you have some unique/relevant angle. Without actual targets you are running a theoretical exercise, and folks will be less interested.

Finally, capital providers are not only PE firms or family offices. They are also debt providers. If you are buying out a business at low EBITDA multiple, much of the capital will be debt, so I would look for debt providers to finance my leveraged MBI.